sys/netinet/sctp_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #if defined(INET) || defined(INET6)
  51 #include <netinet/udp.h>
  52 #endif
  53 #ifdef INET6
  54 #include <netinet6/ip6_var.h>
  55 #endif
  56 #include <sys/sched.h>
  57 #include <sys/smp.h>
  58 #include <sys/unistd.h>
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80 #endif
  81
  82 void
  83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  84 {
  85         /*
  86          * We really don't need to lock this, but I will just because it
  87          * does not hurt.
  88          */
  89         SCTP_INP_INFO_RLOCK();
  90         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  91         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  92         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  93         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  94         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  95         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  96         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  97         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  98         SCTP_INP_INFO_RUNLOCK();
  99 }
 100
 101 /*-
 102  * Addresses are added to VRF's (Virtual Router's). For BSD we
 103  * have only the default VRF 0. We maintain a hash list of
 104  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 105  * these has a list of addresses. When we add a new address
 106  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 107  * not exist we create it and add it to the list of IFN's
 108  * within the VRF. Once we have the sctp_ifn, we add the
 109  * address to the list. So we look something like:
 110  *
 111  * hash-vrf-table
 112  *   vrf-> ifn-> ifn -> ifn
 113  *   vrf    |
 114  *    ...   +--ifa-> ifa -> ifa
 115  *   vrf
 116  *
 117  * We keep these separate lists since the SCTP subsystem will
 118  * point to these from its source address selection nets structure.
 119  * When an address is deleted it does not happen right away on
 120  * the SCTP side, it gets scheduled. What we do when a
 121  * delete happens is immediately remove the address from
 122  * the master list and decrement the refcount. As our
 123  * addip iterator works through and frees the src address
 124  * selection pointing to the sctp_ifa, eventually the refcount
 125  * will reach 0 and we will delete it. Note that it is assumed
 126  * that any locking on system level ifn/ifa is done at the
 127  * caller of these functions and these routines will only
 128  * lock the SCTP structures as they add or delete things.
 129  *
 130  * Other notes on VRF concepts.
 131  *  - An endpoint can be in multiple VRF's
 132  *  - An association lives within a VRF and only one VRF.
 133  *  - Any incoming packet we can deduce the VRF for by
 134  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 135  *  - Any downward send call or connect call must supply the
 136  *    VRF via ancillary data or via some sort of set default
 137  *    VRF socket option call (again for BSD no brainer since
 138  *    the VRF is always 0).
 139  *  - An endpoint may add multiple VRF's to it.
 140  *  - Listening sockets can accept associations in any
 141  *    of the VRF's they are in but the assoc will end up
 142  *    in only one VRF (gotten from the packet or connect/send).
 143  *
 144  */
 145
 146 struct sctp_vrf *
 147 sctp_allocate_vrf(int vrf_id)
 148 {
 149         struct sctp_vrf *vrf = NULL;
 150         struct sctp_vrflist *bucket;
 151
 152         /* First allocate the VRF structure */
 153         vrf = sctp_find_vrf(vrf_id);
 154         if (vrf) {
 155                 /* Already allocated */
 156                 return (vrf);
 157         }
 158         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 159             SCTP_M_VRF);
 160         if (vrf == NULL) {
 161                 /* No memory */
 162 #ifdef INVARIANTS
 163                 panic("No memory for VRF:%d", vrf_id);
 164 #endif
 165                 return (NULL);
 166         }
 167         /* setup the VRF */
 168         memset(vrf, 0, sizeof(struct sctp_vrf));
 169         vrf->vrf_id = vrf_id;
 170         LIST_INIT(&vrf->ifnlist);
 171         vrf->total_ifa_count = 0;
 172         vrf->refcount = 0;
 173         /* now also setup table ids */
 174         SCTP_INIT_VRF_TABLEID(vrf);
 175         /* Init the HASH of addresses */
 176         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 177             &vrf->vrf_addr_hashmark);
 178         if (vrf->vrf_addr_hash == NULL) {
 179                 /* No memory */
 180 #ifdef INVARIANTS
 181                 panic("No memory for VRF:%d", vrf_id);
 182 #endif
 183                 SCTP_FREE(vrf, SCTP_M_VRF);
 184                 return (NULL);
 185         }
 186
 187         /* Add it to the hash table */
 188         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 189         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 190         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 191         return (vrf);
 192 }
 193
 194
 195 struct sctp_ifn *
 196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 197 {
 198         struct sctp_ifn *sctp_ifnp;
 199         struct sctp_ifnlist *hash_ifn_head;
 200
 201         /*
 202          * We assume the lock is held for the addresses if that's wrong
 203          * problems could occur :-)
 204          */
 205         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 206         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 207                 if (sctp_ifnp->ifn_index == ifn_index) {
 208                         return (sctp_ifnp);
 209                 }
 210                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 211                         return (sctp_ifnp);
 212                 }
 213         }
 214         return (NULL);
 215 }
 216
 217
 218 struct sctp_vrf *
 219 sctp_find_vrf(uint32_t vrf_id)
 220 {
 221         struct sctp_vrflist *bucket;
 222         struct sctp_vrf *liste;
 223
 224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 225         LIST_FOREACH(liste, bucket, next_vrf) {
 226                 if (vrf_id == liste->vrf_id) {
 227                         return (liste);
 228                 }
 229         }
 230         return (NULL);
 231 }
 232
 233
 234 void
 235 sctp_free_vrf(struct sctp_vrf *vrf)
 236 {
 237         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 238                 if (vrf->vrf_addr_hash) {
 239                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 240                         vrf->vrf_addr_hash = NULL;
 241                 }
 242                 /* We zero'd the count */
 243                 LIST_REMOVE(vrf, next_vrf);
 244                 SCTP_FREE(vrf, SCTP_M_VRF);
 245                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 246         }
 247 }
 248
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263
 264 void
 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 266 {
 267         struct sctp_ifn *sctp_ifnp;
 268
 269         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 270         if (sctp_ifnp != NULL) {
 271                 sctp_ifnp->ifn_mtu = mtu;
 272         }
 273 }
 274
 275
 276 void
 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 278 {
 279         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 280                 /* We zero'd the count */
 281                 if (sctp_ifap->ifn_p) {
 282                         sctp_free_ifn(sctp_ifap->ifn_p);
 283                 }
 284                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 285                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 286         }
 287 }
 288
 289
 290 static void
 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 292 {
 293         struct sctp_ifn *found;
 294
 295         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 296         if (found == NULL) {
 297                 /* Not in the list.. sorry */
 298                 return;
 299         }
 300         if (hold_addr_lock == 0)
 301                 SCTP_IPI_ADDR_WLOCK();
 302         LIST_REMOVE(sctp_ifnp, next_bucket);
 303         LIST_REMOVE(sctp_ifnp, next_ifn);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310
 311 void
 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 313     const char *if_name, uint32_t ifn_index)
 314 {
 315         struct sctp_vrf *vrf;
 316         struct sctp_ifa *sctp_ifap;
 317
 318         SCTP_IPI_ADDR_RLOCK();
 319         vrf = sctp_find_vrf(vrf_id);
 320         if (vrf == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 322                 goto out;
 323
 324         }
 325         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 326         if (sctp_ifap == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 328                 goto out;
 329         }
 330         if (sctp_ifap->ifn_p == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 332                 goto out;
 333         }
 334         if (if_name) {
 335                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 337                             sctp_ifap->ifn_p->ifn_name, if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354
 355 void
 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 357     const char *if_name, uint32_t ifn_index)
 358 {
 359         struct sctp_vrf *vrf;
 360         struct sctp_ifa *sctp_ifap;
 361
 362         SCTP_IPI_ADDR_RLOCK();
 363         vrf = sctp_find_vrf(vrf_id);
 364         if (vrf == NULL) {
 365                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 366                 goto out;
 367
 368         }
 369         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 370         if (sctp_ifap == NULL) {
 371                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 372                 goto out;
 373         }
 374         if (sctp_ifap->ifn_p == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 376                 goto out;
 377         }
 378         if (if_name) {
 379                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 380                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 381                             sctp_ifap->ifn_p->ifn_name, if_name);
 382                         goto out;
 383                 }
 384         } else {
 385                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 386                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 387                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 388                         goto out;
 389                 }
 390         }
 391
 392         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 393         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 394 out:
 395         SCTP_IPI_ADDR_RUNLOCK();
 396 }
 397
 398
 399 /*-
 400  * Add an ifa to an ifn.
 401  * Register the interface as necessary.
 402  * NOTE: ADDR write lock MUST be held.
 403  */
 404 static void
 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 406 {
 407         int ifa_af;
 408
 409         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 410         sctp_ifap->ifn_p = sctp_ifnp;
 411         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 412         /* update address counts */
 413         sctp_ifnp->ifa_count++;
 414         ifa_af = sctp_ifap->address.sa.sa_family;
 415         switch (ifa_af) {
 416 #ifdef INET
 417         case AF_INET:
 418                 sctp_ifnp->num_v4++;
 419                 break;
 420 #endif
 421 #ifdef INET6
 422         case AF_INET6:
 423                 sctp_ifnp->num_v6++;
 424                 break;
 425 #endif
 426         default:
 427                 break;
 428         }
 429         if (sctp_ifnp->ifa_count == 1) {
 430                 /* register the new interface */
 431                 sctp_ifnp->registered_af = ifa_af;
 432         }
 433 }
 434
 435
 436 /*-
 437  * Remove an ifa from its ifn.
 438  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 439  * the interface based on the remaining address families left.
 440  * NOTE: ADDR write lock MUST be held.
 441  */
 442 static void
 443 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 444 {
 445         LIST_REMOVE(sctp_ifap, next_ifa);
 446         if (sctp_ifap->ifn_p) {
 447                 /* update address counts */
 448                 sctp_ifap->ifn_p->ifa_count--;
 449                 switch (sctp_ifap->address.sa.sa_family) {
 450 #ifdef INET
 451                 case AF_INET:
 452                         sctp_ifap->ifn_p->num_v4--;
 453                         break;
 454 #endif
 455 #ifdef INET6
 456                 case AF_INET6:
 457                         sctp_ifap->ifn_p->num_v6--;
 458                         break;
 459 #endif
 460                 default:
 461                         break;
 462                 }
 463
 464                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 465                         /* remove the ifn, possibly freeing it */
 466                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 467                 } else {
 468                         /* re-register address family type, if needed */
 469                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 470                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 471                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 472                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 473                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 474                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 475                         }
 476                         /* free the ifn refcount */
 477                         sctp_free_ifn(sctp_ifap->ifn_p);
 478                 }
 479                 sctp_ifap->ifn_p = NULL;
 480         }
 481 }
 482
 483
 484 struct sctp_ifa *
 485 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 486     uint32_t ifn_type, const char *if_name, void *ifa,
 487     struct sockaddr *addr, uint32_t ifa_flags,
 488     int dynamic_add)
 489 {
 490         struct sctp_vrf *vrf;
 491         struct sctp_ifn *sctp_ifnp = NULL;
 492         struct sctp_ifa *sctp_ifap = NULL;
 493         struct sctp_ifalist *hash_addr_head;
 494         struct sctp_ifnlist *hash_ifn_head;
 495         uint32_t hash_of_addr;
 496         int new_ifn_af = 0;
 497
 498 #ifdef SCTP_DEBUG
 499         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 500         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 501 #endif
 502         SCTP_IPI_ADDR_WLOCK();
 503         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 504         if (sctp_ifnp) {
 505                 vrf = sctp_ifnp->vrf;
 506         } else {
 507                 vrf = sctp_find_vrf(vrf_id);
 508                 if (vrf == NULL) {
 509                         vrf = sctp_allocate_vrf(vrf_id);
 510                         if (vrf == NULL) {
 511                                 SCTP_IPI_ADDR_WUNLOCK();
 512                                 return (NULL);
 513                         }
 514                 }
 515         }
 516         if (sctp_ifnp == NULL) {
 517                 /*
 518                  * build one and add it, can't hold lock until after malloc
 519                  * done though.
 520                  */
 521                 SCTP_IPI_ADDR_WUNLOCK();
 522                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 523                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 524                 if (sctp_ifnp == NULL) {
 525 #ifdef INVARIANTS
 526                         panic("No memory for IFN");
 527 #endif
 528                         return (NULL);
 529                 }
 530                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 531                 sctp_ifnp->ifn_index = ifn_index;
 532                 sctp_ifnp->ifn_p = ifn;
 533                 sctp_ifnp->ifn_type = ifn_type;
 534                 sctp_ifnp->refcount = 0;
 535                 sctp_ifnp->vrf = vrf;
 536                 atomic_add_int(&vrf->refcount, 1);
 537                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 538                 if (if_name != NULL) {
 539                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 540                 } else {
 541                         SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 542                 }
 543                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 544                 LIST_INIT(&sctp_ifnp->ifalist);
 545                 SCTP_IPI_ADDR_WLOCK();
 546                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 547                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 548                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 549                 new_ifn_af = 1;
 550         }
 551         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 552         if (sctp_ifap) {
 553                 /* Hmm, it already exists? */
 554                 if ((sctp_ifap->ifn_p) &&
 555                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 556                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 557                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 558                             (void *)sctp_ifap);
 559                         if (new_ifn_af) {
 560                                 /* Remove the created one that we don't want */
 561                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 562                         }
 563                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 564                                 /* easy to solve, just switch back to active */
 565                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 566                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 567                                 sctp_ifap->ifn_p = sctp_ifnp;
 568                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 569                         }
 570         exit_stage_left:
 571                         SCTP_IPI_ADDR_WUNLOCK();
 572                         return (sctp_ifap);
 573                 } else {
 574                         if (sctp_ifap->ifn_p) {
 575                                 /*
 576                                  * The last IFN gets the address, remove the
 577                                  * old one
 578                                  */
 579                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 580                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 581                                     sctp_ifap->ifn_p->ifn_index, if_name,
 582                                     ifn_index);
 583                                 /* remove the address from the old ifn */
 584                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 585                                 /* move the address over to the new ifn */
 586                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 587                                 goto exit_stage_left;
 588                         } else {
 589                                 /* repair ifnp which was NULL ? */
 590                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 591                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 592                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                         }
 595                         goto exit_stage_left;
 596                 }
 597         }
 598         SCTP_IPI_ADDR_WUNLOCK();
 599         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 600         if (sctp_ifap == NULL) {
 601 #ifdef INVARIANTS
 602                 panic("No memory for IFA");
 603 #endif
 604                 return (NULL);
 605         }
 606         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 607         sctp_ifap->ifn_p = sctp_ifnp;
 608         atomic_add_int(&sctp_ifnp->refcount, 1);
 609         sctp_ifap->vrf_id = vrf_id;
 610         sctp_ifap->ifa = ifa;
 611         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 612         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 613         sctp_ifap->flags = ifa_flags;
 614         /* Set scope */
 615         switch (sctp_ifap->address.sa.sa_family) {
 616 #ifdef INET
 617         case AF_INET:
 618                 {
 619                         struct sockaddr_in *sin;
 620
 621                         sin = &sctp_ifap->address.sin;
 622                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 623                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 624                                 sctp_ifap->src_is_loop = 1;
 625                         }
 626                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 627                                 sctp_ifap->src_is_priv = 1;
 628                         }
 629                         sctp_ifnp->num_v4++;
 630                         if (new_ifn_af)
 631                                 new_ifn_af = AF_INET;
 632                         break;
 633                 }
 634 #endif
 635 #ifdef INET6
 636         case AF_INET6:
 637                 {
 638                         /* ok to use deprecated addresses? */
 639                         struct sockaddr_in6 *sin6;
 640
 641                         sin6 = &sctp_ifap->address.sin6;
 642                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 643                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 644                                 sctp_ifap->src_is_loop = 1;
 645                         }
 646                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 647                                 sctp_ifap->src_is_priv = 1;
 648                         }
 649                         sctp_ifnp->num_v6++;
 650                         if (new_ifn_af)
 651                                 new_ifn_af = AF_INET6;
 652                         break;
 653                 }
 654 #endif
 655         default:
 656                 new_ifn_af = 0;
 657                 break;
 658         }
 659         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 660
 661         if ((sctp_ifap->src_is_priv == 0) &&
 662             (sctp_ifap->src_is_loop == 0)) {
 663                 sctp_ifap->src_is_glob = 1;
 664         }
 665         SCTP_IPI_ADDR_WLOCK();
 666         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 667         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 668         sctp_ifap->refcount = 1;
 669         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 670         sctp_ifnp->ifa_count++;
 671         vrf->total_ifa_count++;
 672         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 673         if (new_ifn_af) {
 674                 sctp_ifnp->registered_af = new_ifn_af;
 675         }
 676         SCTP_IPI_ADDR_WUNLOCK();
 677         if (dynamic_add) {
 678                 /*
 679                  * Bump up the refcount so that when the timer completes it
 680                  * will drop back down.
 681                  */
 682                 struct sctp_laddr *wi;
 683
 684                 atomic_add_int(&sctp_ifap->refcount, 1);
 685                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 686                 if (wi == NULL) {
 687                         /*
 688                          * Gak, what can we do? We have lost an address
 689                          * change can you say HOSED?
 690                          */
 691                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 692                         /* Opps, must decrement the count */
 693                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 694                             if_name);
 695                         return (NULL);
 696                 }
 697                 SCTP_INCR_LADDR_COUNT();
 698                 memset(wi, 0, sizeof(*wi));
 699                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 700                 wi->ifa = sctp_ifap;
 701                 wi->action = SCTP_ADD_IP_ADDRESS;
 702
 703                 SCTP_WQ_ADDR_LOCK();
 704                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 705                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 706                     (struct sctp_inpcb *)NULL,
 707                     (struct sctp_tcb *)NULL,
 708                     (struct sctp_nets *)NULL);
 709                 SCTP_WQ_ADDR_UNLOCK();
 710         } else {
 711                 /* it's ready for use */
 712                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 713         }
 714         return (sctp_ifap);
 715 }
 716
 717 void
 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 719     uint32_t ifn_index, const char *if_name)
 720 {
 721         struct sctp_vrf *vrf;
 722         struct sctp_ifa *sctp_ifap = NULL;
 723
 724         SCTP_IPI_ADDR_WLOCK();
 725         vrf = sctp_find_vrf(vrf_id);
 726         if (vrf == NULL) {
 727                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 728                 goto out_now;
 729         }
 730
 731 #ifdef SCTP_DEBUG
 732         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 733         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 734 #endif
 735         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 736         if (sctp_ifap) {
 737                 /* Validate the delete */
 738                 if (sctp_ifap->ifn_p) {
 739                         int valid = 0;
 740
 741                         /*-
 742                          * The name has priority over the ifn_index
 743                          * if its given.
 744                          */
 745                         if (if_name) {
 746                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 747                                         /* They match its a correct delete */
 748                                         valid = 1;
 749                                 }
 750                         }
 751                         if (!valid) {
 752                                 /* last ditch check ifn_index */
 753                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 754                                         valid = 1;
 755                                 }
 756                         }
 757                         if (!valid) {
 758                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 759                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 760                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 761                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 762                                 SCTP_IPI_ADDR_WUNLOCK();
 763                                 return;
 764                         }
 765                 }
 766                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 767                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 768                 /*
 769                  * We don't set the flag. This means that the structure will
 770                  * hang around in EP's that have bound specific to it until
 771                  * they close. This gives us TCP like behavior if someone
 772                  * removes an address (or for that matter adds it right
 773                  * back).
 774                  */
 775                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 776                 vrf->total_ifa_count--;
 777                 LIST_REMOVE(sctp_ifap, next_bucket);
 778                 sctp_remove_ifa_from_ifn(sctp_ifap);
 779         }
 780 #ifdef SCTP_DEBUG
 781         else {
 782                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 783                     ifn_index);
 784                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 785         }
 786 #endif
 787
 788 out_now:
 789         SCTP_IPI_ADDR_WUNLOCK();
 790         if (sctp_ifap) {
 791                 struct sctp_laddr *wi;
 792
 793                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 794                 if (wi == NULL) {
 795                         /*
 796                          * Gak, what can we do? We have lost an address
 797                          * change can you say HOSED?
 798                          */
 799                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 800
 801                         /* Oops, must decrement the count */
 802                         sctp_free_ifa(sctp_ifap);
 803                         return;
 804                 }
 805                 SCTP_INCR_LADDR_COUNT();
 806                 memset(wi, 0, sizeof(*wi));
 807                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 808                 wi->ifa = sctp_ifap;
 809                 wi->action = SCTP_DEL_IP_ADDRESS;
 810                 SCTP_WQ_ADDR_LOCK();
 811                 /*
 812                  * Should this really be a tailq? As it is we will process
 813                  * the newest first :-0
 814                  */
 815                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 816                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 817                     (struct sctp_inpcb *)NULL,
 818                     (struct sctp_tcb *)NULL,
 819                     (struct sctp_nets *)NULL);
 820                 SCTP_WQ_ADDR_UNLOCK();
 821         }
 822         return;
 823 }
 824
 825
 826 static int
 827 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 828 {
 829         int loopback_scope;
 830 #if defined(INET)
 831         int ipv4_local_scope, ipv4_addr_legal;
 832 #endif
 833 #if defined(INET6)
 834         int local_scope, site_scope, ipv6_addr_legal;
 835 #endif
 836         struct sctp_vrf *vrf;
 837         struct sctp_ifn *sctp_ifn;
 838         struct sctp_ifa *sctp_ifa;
 839
 840         loopback_scope = stcb->asoc.scope.loopback_scope;
 841 #if defined(INET)
 842         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 843         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 844 #endif
 845 #if defined(INET6)
 846         local_scope = stcb->asoc.scope.local_scope;
 847         site_scope = stcb->asoc.scope.site_scope;
 848         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 849 #endif
 850
 851         SCTP_IPI_ADDR_RLOCK();
 852         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 853         if (vrf == NULL) {
 854                 /* no vrf, no addresses */
 855                 SCTP_IPI_ADDR_RUNLOCK();
 856                 return (0);
 857         }
 858
 859         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 860                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 861                         if ((loopback_scope == 0) &&
 862                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 863                                 continue;
 864                         }
 865                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 866                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 867                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 868                                         /*
 869                                          * We allow pending addresses, where
 870                                          * we have sent an asconf-add to be
 871                                          * considered valid.
 872                                          */
 873                                         continue;
 874                                 }
 875                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 876                                         continue;
 877                                 }
 878                                 switch (sctp_ifa->address.sa.sa_family) {
 879 #ifdef INET
 880                                 case AF_INET:
 881                                         if (ipv4_addr_legal) {
 882                                                 struct sockaddr_in *sin,
 883                                                            *rsin;
 884
 885                                                 sin = &sctp_ifa->address.sin;
 886                                                 rsin = (struct sockaddr_in *)to;
 887                                                 if ((ipv4_local_scope == 0) &&
 888                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 889                                                         continue;
 890                                                 }
 891                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 892                                                     &sin->sin_addr) != 0) {
 893                                                         continue;
 894                                                 }
 895                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 896                                                         SCTP_IPI_ADDR_RUNLOCK();
 897                                                         return (1);
 898                                                 }
 899                                         }
 900                                         break;
 901 #endif
 902 #ifdef INET6
 903                                 case AF_INET6:
 904                                         if (ipv6_addr_legal) {
 905                                                 struct sockaddr_in6 *sin6,
 906                                                             *rsin6;
 907
 908                                                 sin6 = &sctp_ifa->address.sin6;
 909                                                 rsin6 = (struct sockaddr_in6 *)to;
 910                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 911                                                     &sin6->sin6_addr) != 0) {
 912                                                         continue;
 913                                                 }
 914                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 915                                                         if (local_scope == 0)
 916                                                                 continue;
 917                                                         if (sin6->sin6_scope_id == 0) {
 918                                                                 if (sa6_recoverscope(sin6) != 0)
 919                                                                         continue;
 920                                                         }
 921                                                 }
 922                                                 if ((site_scope == 0) &&
 923                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 924                                                         continue;
 925                                                 }
 926                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 927                                                         SCTP_IPI_ADDR_RUNLOCK();
 928                                                         return (1);
 929                                                 }
 930                                         }
 931                                         break;
 932 #endif
 933                                 default:
 934                                         /* TSNH */
 935                                         break;
 936                                 }
 937                         }
 938                 }
 939         } else {
 940                 struct sctp_laddr *laddr;
 941
 942                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 943                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 944                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 945                                 continue;
 946                         }
 947                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 948                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 949                                 /*
 950                                  * We allow pending addresses, where we have
 951                                  * sent an asconf-add to be considered
 952                                  * valid.
 953                                  */
 954                                 continue;
 955                         }
 956                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 957                                 continue;
 958                         }
 959                         switch (to->sa_family) {
 960 #ifdef INET
 961                         case AF_INET:
 962                                 {
 963                                         struct sockaddr_in *sin, *rsin;
 964
 965                                         sin = &laddr->ifa->address.sin;
 966                                         rsin = (struct sockaddr_in *)to;
 967                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 968                                                 SCTP_IPI_ADDR_RUNLOCK();
 969                                                 return (1);
 970                                         }
 971                                         break;
 972                                 }
 973 #endif
 974 #ifdef INET6
 975                         case AF_INET6:
 976                                 {
 977                                         struct sockaddr_in6 *sin6, *rsin6;
 978
 979                                         sin6 = &laddr->ifa->address.sin6;
 980                                         rsin6 = (struct sockaddr_in6 *)to;
 981                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 982                                                 SCTP_IPI_ADDR_RUNLOCK();
 983                                                 return (1);
 984                                         }
 985                                         break;
 986                                 }
 987
 988 #endif
 989                         default:
 990                                 /* TSNH */
 991                                 break;
 992                         }
 993
 994                 }
 995         }
 996         SCTP_IPI_ADDR_RUNLOCK();
 997         return (0);
 998 }
 999
1000
1001 static struct sctp_tcb *
1002 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1003     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1004 {
1005         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1006         /*
1007          * If we support the TCP model, then we must now dig through to see
1008          * if we can find our endpoint in the list of tcp ep's.
1009          */
1010         uint16_t lport, rport;
1011         struct sctppcbhead *ephead;
1012         struct sctp_inpcb *inp;
1013         struct sctp_laddr *laddr;
1014         struct sctp_tcb *stcb;
1015         struct sctp_nets *net;
1016
1017         if ((to == NULL) || (from == NULL)) {
1018                 return (NULL);
1019         }
1020
1021         switch (to->sa_family) {
1022 #ifdef INET
1023         case AF_INET:
1024                 if (from->sa_family == AF_INET) {
1025                         lport = ((struct sockaddr_in *)to)->sin_port;
1026                         rport = ((struct sockaddr_in *)from)->sin_port;
1027                 } else {
1028                         return (NULL);
1029                 }
1030                 break;
1031 #endif
1032 #ifdef INET6
1033         case AF_INET6:
1034                 if (from->sa_family == AF_INET6) {
1035                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1036                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1037                 } else {
1038                         return (NULL);
1039                 }
1040                 break;
1041 #endif
1042         default:
1043                 return (NULL);
1044         }
1045         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1046         /*
1047          * Ok now for each of the guys in this bucket we must look and see:
1048          * - Does the remote port match. - Does there single association's
1049          * addresses match this address (to). If so we update p_ep to point
1050          * to this ep and return the tcb from it.
1051          */
1052         LIST_FOREACH(inp, ephead, sctp_hash) {
1053                 SCTP_INP_RLOCK(inp);
1054                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1055                         SCTP_INP_RUNLOCK(inp);
1056                         continue;
1057                 }
1058                 if (lport != inp->sctp_lport) {
1059                         SCTP_INP_RUNLOCK(inp);
1060                         continue;
1061                 }
1062                 switch (to->sa_family) {
1063 #ifdef INET
1064                 case AF_INET:
1065                         {
1066                                 struct sockaddr_in *sin;
1067
1068                                 sin = (struct sockaddr_in *)to;
1069                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1070                                     &sin->sin_addr) != 0) {
1071                                         SCTP_INP_RUNLOCK(inp);
1072                                         continue;
1073                                 }
1074                                 break;
1075                         }
1076 #endif
1077 #ifdef INET6
1078                 case AF_INET6:
1079                         {
1080                                 struct sockaddr_in6 *sin6;
1081
1082                                 sin6 = (struct sockaddr_in6 *)to;
1083                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1084                                     &sin6->sin6_addr) != 0) {
1085                                         SCTP_INP_RUNLOCK(inp);
1086                                         continue;
1087                                 }
1088                                 break;
1089                         }
1090 #endif
1091                 default:
1092                         SCTP_INP_RUNLOCK(inp);
1093                         continue;
1094                 }
1095                 if (inp->def_vrf_id != vrf_id) {
1096                         SCTP_INP_RUNLOCK(inp);
1097                         continue;
1098                 }
1099                 /* check to see if the ep has one of the addresses */
1100                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1101                         /* We are NOT bound all, so look further */
1102                         int match = 0;
1103
1104                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1105
1106                                 if (laddr->ifa == NULL) {
1107                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1108                                         continue;
1109                                 }
1110                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1111                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1112                                         continue;
1113                                 }
1114                                 if (laddr->ifa->address.sa.sa_family ==
1115                                     to->sa_family) {
1116                                         /* see if it matches */
1117 #ifdef INET
1118                                         if (from->sa_family == AF_INET) {
1119                                                 struct sockaddr_in *intf_addr,
1120                                                            *sin;
1121
1122                                                 intf_addr = &laddr->ifa->address.sin;
1123                                                 sin = (struct sockaddr_in *)to;
1124                                                 if (sin->sin_addr.s_addr ==
1125                                                     intf_addr->sin_addr.s_addr) {
1126                                                         match = 1;
1127                                                         break;
1128                                                 }
1129                                         }
1130 #endif
1131 #ifdef INET6
1132                                         if (from->sa_family == AF_INET6) {
1133                                                 struct sockaddr_in6 *intf_addr6;
1134                                                 struct sockaddr_in6 *sin6;
1135
1136                                                 sin6 = (struct sockaddr_in6 *)
1137                                                     to;
1138                                                 intf_addr6 = &laddr->ifa->address.sin6;
1139
1140                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1141                                                     intf_addr6)) {
1142                                                         match = 1;
1143                                                         break;
1144                                                 }
1145                                         }
1146 #endif
1147                                 }
1148                         }
1149                         if (match == 0) {
1150                                 /* This endpoint does not have this address */
1151                                 SCTP_INP_RUNLOCK(inp);
1152                                 continue;
1153                         }
1154                 }
1155                 /*
1156                  * Ok if we hit here the ep has the address, does it hold
1157                  * the tcb?
1158                  */
1159                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1160                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1161                 if (stcb == NULL) {
1162                         SCTP_INP_RUNLOCK(inp);
1163                         continue;
1164                 }
1165                 SCTP_TCB_LOCK(stcb);
1166                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1167                         SCTP_TCB_UNLOCK(stcb);
1168                         SCTP_INP_RUNLOCK(inp);
1169                         continue;
1170                 }
1171                 if (stcb->rport != rport) {
1172                         /* remote port does not match. */
1173                         SCTP_TCB_UNLOCK(stcb);
1174                         SCTP_INP_RUNLOCK(inp);
1175                         continue;
1176                 }
1177                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1183                         SCTP_TCB_UNLOCK(stcb);
1184                         SCTP_INP_RUNLOCK(inp);
1185                         continue;
1186                 }
1187                 /* Does this TCB have a matching address? */
1188                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1189
1190                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1191                                 /* not the same family, can't be a match */
1192                                 continue;
1193                         }
1194                         switch (from->sa_family) {
1195 #ifdef INET
1196                         case AF_INET:
1197                                 {
1198                                         struct sockaddr_in *sin, *rsin;
1199
1200                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1201                                         rsin = (struct sockaddr_in *)from;
1202                                         if (sin->sin_addr.s_addr ==
1203                                             rsin->sin_addr.s_addr) {
1204                                                 /* found it */
1205                                                 if (netp != NULL) {
1206                                                         *netp = net;
1207                                                 }
1208                                                 /*
1209                                                  * Update the endpoint
1210                                                  * pointer
1211                                                  */
1212                                                 *inp_p = inp;
1213                                                 SCTP_INP_RUNLOCK(inp);
1214                                                 return (stcb);
1215                                         }
1216                                         break;
1217                                 }
1218 #endif
1219 #ifdef INET6
1220                         case AF_INET6:
1221                                 {
1222                                         struct sockaddr_in6 *sin6, *rsin6;
1223
1224                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1225                                         rsin6 = (struct sockaddr_in6 *)from;
1226                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1227                                             rsin6)) {
1228                                                 /* found it */
1229                                                 if (netp != NULL) {
1230                                                         *netp = net;
1231                                                 }
1232                                                 /*
1233                                                  * Update the endpoint
1234                                                  * pointer
1235                                                  */
1236                                                 *inp_p = inp;
1237                                                 SCTP_INP_RUNLOCK(inp);
1238                                                 return (stcb);
1239                                         }
1240                                         break;
1241                                 }
1242 #endif
1243                         default:
1244                                 /* TSNH */
1245                                 break;
1246                         }
1247                 }
1248                 SCTP_TCB_UNLOCK(stcb);
1249                 SCTP_INP_RUNLOCK(inp);
1250         }
1251         return (NULL);
1252 }
1253
1254
1255 /*
1256  * rules for use
1257  *
1258  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1259  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1260  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1261  * NULL.
1262  */
1263
1264 struct sctp_tcb *
1265 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1266     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1267 {
1268         struct sctpasochead *head;
1269         struct sctp_inpcb *inp;
1270         struct sctp_tcb *stcb = NULL;
1271         struct sctp_nets *net;
1272         uint16_t rport;
1273
1274         inp = *inp_p;
1275         switch (remote->sa_family) {
1276 #ifdef INET
1277         case AF_INET:
1278                 rport = (((struct sockaddr_in *)remote)->sin_port);
1279                 break;
1280 #endif
1281 #ifdef INET6
1282         case AF_INET6:
1283                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1284                 break;
1285 #endif
1286         default:
1287                 return (NULL);
1288         }
1289         if (locked_tcb) {
1290                 /*
1291                  * UN-lock so we can do proper locking here this occurs when
1292                  * called from load_addresses_from_init.
1293                  */
1294                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1295                 SCTP_TCB_UNLOCK(locked_tcb);
1296         }
1297         SCTP_INP_INFO_RLOCK();
1298         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1299             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1300                 /*-
1301                  * Now either this guy is our listener or it's the
1302                  * connector. If it is the one that issued the connect, then
1303                  * it's only chance is to be the first TCB in the list. If
1304                  * it is the acceptor, then do the special_lookup to hash
1305                  * and find the real inp.
1306                  */
1307                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1308                         /* to is peer addr, from is my addr */
1309                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1310                             netp, inp->def_vrf_id);
1311                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1312                                 /* we have a locked tcb, lower refcount */
1313                                 SCTP_INP_DECR_REF(inp);
1314                         }
1315                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1316                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1317                                 SCTP_TCB_LOCK(locked_tcb);
1318                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1319                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1320                         }
1321                         SCTP_INP_INFO_RUNLOCK();
1322                         return (stcb);
1323                 } else {
1324                         SCTP_INP_WLOCK(inp);
1325                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1326                                 goto null_return;
1327                         }
1328                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1329                         if (stcb == NULL) {
1330                                 goto null_return;
1331                         }
1332                         SCTP_TCB_LOCK(stcb);
1333
1334                         if (stcb->rport != rport) {
1335                                 /* remote port does not match. */
1336                                 SCTP_TCB_UNLOCK(stcb);
1337                                 goto null_return;
1338                         }
1339                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1340                                 SCTP_TCB_UNLOCK(stcb);
1341                                 goto null_return;
1342                         }
1343                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1344                                 SCTP_TCB_UNLOCK(stcb);
1345                                 goto null_return;
1346                         }
1347                         /* now look at the list of remote addresses */
1348                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1349 #ifdef INVARIANTS
1350                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1351                                         panic("Corrupt net list");
1352                                 }
1353 #endif
1354                                 if (net->ro._l_addr.sa.sa_family !=
1355                                     remote->sa_family) {
1356                                         /* not the same family */
1357                                         continue;
1358                                 }
1359                                 switch (remote->sa_family) {
1360 #ifdef INET
1361                                 case AF_INET:
1362                                         {
1363                                                 struct sockaddr_in *sin,
1364                                                            *rsin;
1365
1366                                                 sin = (struct sockaddr_in *)
1367                                                     &net->ro._l_addr;
1368                                                 rsin = (struct sockaddr_in *)remote;
1369                                                 if (sin->sin_addr.s_addr ==
1370                                                     rsin->sin_addr.s_addr) {
1371                                                         /* found it */
1372                                                         if (netp != NULL) {
1373                                                                 *netp = net;
1374                                                         }
1375                                                         if (locked_tcb == NULL) {
1376                                                                 SCTP_INP_DECR_REF(inp);
1377                                                         } else if (locked_tcb != stcb) {
1378                                                                 SCTP_TCB_LOCK(locked_tcb);
1379                                                         }
1380                                                         if (locked_tcb) {
1381                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1382                                                         }
1383
1384                                                         SCTP_INP_WUNLOCK(inp);
1385                                                         SCTP_INP_INFO_RUNLOCK();
1386                                                         return (stcb);
1387                                                 }
1388                                                 break;
1389                                         }
1390 #endif
1391 #ifdef INET6
1392                                 case AF_INET6:
1393                                         {
1394                                                 struct sockaddr_in6 *sin6,
1395                                                             *rsin6;
1396
1397                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1398                                                 rsin6 = (struct sockaddr_in6 *)remote;
1399                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1400                                                     rsin6)) {
1401                                                         /* found it */
1402                                                         if (netp != NULL) {
1403                                                                 *netp = net;
1404                                                         }
1405                                                         if (locked_tcb == NULL) {
1406                                                                 SCTP_INP_DECR_REF(inp);
1407                                                         } else if (locked_tcb != stcb) {
1408                                                                 SCTP_TCB_LOCK(locked_tcb);
1409                                                         }
1410                                                         if (locked_tcb) {
1411                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1412                                                         }
1413                                                         SCTP_INP_WUNLOCK(inp);
1414                                                         SCTP_INP_INFO_RUNLOCK();
1415                                                         return (stcb);
1416                                                 }
1417                                                 break;
1418                                         }
1419 #endif
1420                                 default:
1421                                         /* TSNH */
1422                                         break;
1423                                 }
1424                         }
1425                         SCTP_TCB_UNLOCK(stcb);
1426                 }
1427         } else {
1428                 SCTP_INP_WLOCK(inp);
1429                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1430                         goto null_return;
1431                 }
1432                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1433                     inp->sctp_hashmark)];
1434                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1435                         if (stcb->rport != rport) {
1436                                 /* remote port does not match */
1437                                 continue;
1438                         }
1439                         SCTP_TCB_LOCK(stcb);
1440                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1441                                 SCTP_TCB_UNLOCK(stcb);
1442                                 continue;
1443                         }
1444                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1445                                 SCTP_TCB_UNLOCK(stcb);
1446                                 continue;
1447                         }
1448                         /* now look at the list of remote addresses */
1449                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1450 #ifdef INVARIANTS
1451                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1452                                         panic("Corrupt net list");
1453                                 }
1454 #endif
1455                                 if (net->ro._l_addr.sa.sa_family !=
1456                                     remote->sa_family) {
1457                                         /* not the same family */
1458                                         continue;
1459                                 }
1460                                 switch (remote->sa_family) {
1461 #ifdef INET
1462                                 case AF_INET:
1463                                         {
1464                                                 struct sockaddr_in *sin,
1465                                                            *rsin;
1466
1467                                                 sin = (struct sockaddr_in *)
1468                                                     &net->ro._l_addr;
1469                                                 rsin = (struct sockaddr_in *)remote;
1470                                                 if (sin->sin_addr.s_addr ==
1471                                                     rsin->sin_addr.s_addr) {
1472                                                         /* found it */
1473                                                         if (netp != NULL) {
1474                                                                 *netp = net;
1475                                                         }
1476                                                         if (locked_tcb == NULL) {
1477                                                                 SCTP_INP_DECR_REF(inp);
1478                                                         } else if (locked_tcb != stcb) {
1479                                                                 SCTP_TCB_LOCK(locked_tcb);
1480                                                         }
1481                                                         if (locked_tcb) {
1482                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1483                                                         }
1484                                                         SCTP_INP_WUNLOCK(inp);
1485                                                         SCTP_INP_INFO_RUNLOCK();
1486                                                         return (stcb);
1487                                                 }
1488                                                 break;
1489                                         }
1490 #endif
1491 #ifdef INET6
1492                                 case AF_INET6:
1493                                         {
1494                                                 struct sockaddr_in6 *sin6,
1495                                                             *rsin6;
1496
1497                                                 sin6 = (struct sockaddr_in6 *)
1498                                                     &net->ro._l_addr;
1499                                                 rsin6 = (struct sockaddr_in6 *)remote;
1500                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1501                                                     rsin6)) {
1502                                                         /* found it */
1503                                                         if (netp != NULL) {
1504                                                                 *netp = net;
1505                                                         }
1506                                                         if (locked_tcb == NULL) {
1507                                                                 SCTP_INP_DECR_REF(inp);
1508                                                         } else if (locked_tcb != stcb) {
1509                                                                 SCTP_TCB_LOCK(locked_tcb);
1510                                                         }
1511                                                         if (locked_tcb) {
1512                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1513                                                         }
1514                                                         SCTP_INP_WUNLOCK(inp);
1515                                                         SCTP_INP_INFO_RUNLOCK();
1516                                                         return (stcb);
1517                                                 }
1518                                                 break;
1519                                         }
1520 #endif
1521                                 default:
1522                                         /* TSNH */
1523                                         break;
1524                                 }
1525                         }
1526                         SCTP_TCB_UNLOCK(stcb);
1527                 }
1528         }
1529 null_return:
1530         /* clean up for returning null */
1531         if (locked_tcb) {
1532                 SCTP_TCB_LOCK(locked_tcb);
1533                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1534         }
1535         SCTP_INP_WUNLOCK(inp);
1536         SCTP_INP_INFO_RUNLOCK();
1537         /* not found */
1538         return (NULL);
1539 }
1540
1541
1542 /*
1543  * Find an association for a specific endpoint using the association id given
1544  * out in the COMM_UP notification
1545  */
1546 struct sctp_tcb *
1547 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1548 {
1549         /*
1550          * Use my the assoc_id to find a endpoint
1551          */
1552         struct sctpasochead *head;
1553         struct sctp_tcb *stcb;
1554         uint32_t id;
1555
1556         if (inp == NULL) {
1557                 SCTP_PRINTF("TSNH ep_associd\n");
1558                 return (NULL);
1559         }
1560         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1561                 SCTP_PRINTF("TSNH ep_associd0\n");
1562                 return (NULL);
1563         }
1564         id = (uint32_t)asoc_id;
1565         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1566         if (head == NULL) {
1567                 /* invalid id TSNH */
1568                 SCTP_PRINTF("TSNH ep_associd1\n");
1569                 return (NULL);
1570         }
1571         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1572                 if (stcb->asoc.assoc_id == id) {
1573                         if (inp != stcb->sctp_ep) {
1574                                 /*
1575                                  * some other guy has the same id active (id
1576                                  * collision ??).
1577                                  */
1578                                 SCTP_PRINTF("TSNH ep_associd2\n");
1579                                 continue;
1580                         }
1581                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1582                                 continue;
1583                         }
1584                         if (want_lock) {
1585                                 SCTP_TCB_LOCK(stcb);
1586                         }
1587                         return (stcb);
1588                 }
1589         }
1590         return (NULL);
1591 }
1592
1593
1594 struct sctp_tcb *
1595 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1596 {
1597         struct sctp_tcb *stcb;
1598
1599         SCTP_INP_RLOCK(inp);
1600         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1601         SCTP_INP_RUNLOCK(inp);
1602         return (stcb);
1603 }
1604
1605
1606 /*
1607  * Endpoint probe expects that the INP_INFO is locked.
1608  */
1609 static struct sctp_inpcb *
1610 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1611     uint16_t lport, uint32_t vrf_id)
1612 {
1613         struct sctp_inpcb *inp;
1614         struct sctp_laddr *laddr;
1615 #ifdef INET
1616         struct sockaddr_in *sin;
1617 #endif
1618 #ifdef INET6
1619         struct sockaddr_in6 *sin6;
1620         struct sockaddr_in6 *intf_addr6;
1621 #endif
1622         int fnd;
1623
1624 #ifdef INET
1625         sin = NULL;
1626 #endif
1627 #ifdef INET6
1628         sin6 = NULL;
1629 #endif
1630         switch (nam->sa_family) {
1631 #ifdef INET
1632         case AF_INET:
1633                 sin = (struct sockaddr_in *)nam;
1634                 break;
1635 #endif
1636 #ifdef INET6
1637         case AF_INET6:
1638                 sin6 = (struct sockaddr_in6 *)nam;
1639                 break;
1640 #endif
1641         default:
1642                 /* unsupported family */
1643                 return (NULL);
1644         }
1645
1646         if (head == NULL)
1647                 return (NULL);
1648
1649         LIST_FOREACH(inp, head, sctp_hash) {
1650                 SCTP_INP_RLOCK(inp);
1651                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1652                         SCTP_INP_RUNLOCK(inp);
1653                         continue;
1654                 }
1655                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1656                     (inp->sctp_lport == lport)) {
1657                         /* got it */
1658                         switch (nam->sa_family) {
1659 #ifdef INET
1660                         case AF_INET:
1661                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1662                                     SCTP_IPV6_V6ONLY(inp)) {
1663                                         /*
1664                                          * IPv4 on a IPv6 socket with ONLY
1665                                          * IPv6 set
1666                                          */
1667                                         SCTP_INP_RUNLOCK(inp);
1668                                         continue;
1669                                 }
1670                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1671                                     &sin->sin_addr) != 0) {
1672                                         SCTP_INP_RUNLOCK(inp);
1673                                         continue;
1674                                 }
1675                                 break;
1676 #endif
1677 #ifdef INET6
1678                         case AF_INET6:
1679                                 /*
1680                                  * A V6 address and the endpoint is NOT
1681                                  * bound V6
1682                                  */
1683                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1684                                         SCTP_INP_RUNLOCK(inp);
1685                                         continue;
1686                                 }
1687                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1688                                     &sin6->sin6_addr) != 0) {
1689                                         SCTP_INP_RUNLOCK(inp);
1690                                         continue;
1691                                 }
1692                                 break;
1693 #endif
1694                         default:
1695                                 break;
1696                         }
1697                         /* does a VRF id match? */
1698                         fnd = 0;
1699                         if (inp->def_vrf_id == vrf_id)
1700                                 fnd = 1;
1701
1702                         SCTP_INP_RUNLOCK(inp);
1703                         if (!fnd)
1704                                 continue;
1705                         return (inp);
1706                 }
1707                 SCTP_INP_RUNLOCK(inp);
1708         }
1709         switch (nam->sa_family) {
1710 #ifdef INET
1711         case AF_INET:
1712                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1713                         /* Can't hunt for one that has no address specified */
1714                         return (NULL);
1715                 }
1716                 break;
1717 #endif
1718 #ifdef INET6
1719         case AF_INET6:
1720                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1721                         /* Can't hunt for one that has no address specified */
1722                         return (NULL);
1723                 }
1724                 break;
1725 #endif
1726         default:
1727                 break;
1728         }
1729         /*
1730          * ok, not bound to all so see if we can find a EP bound to this
1731          * address.
1732          */
1733         LIST_FOREACH(inp, head, sctp_hash) {
1734                 SCTP_INP_RLOCK(inp);
1735                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1736                         SCTP_INP_RUNLOCK(inp);
1737                         continue;
1738                 }
1739                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1740                         SCTP_INP_RUNLOCK(inp);
1741                         continue;
1742                 }
1743                 /*
1744                  * Ok this could be a likely candidate, look at all of its
1745                  * addresses
1746                  */
1747                 if (inp->sctp_lport != lport) {
1748                         SCTP_INP_RUNLOCK(inp);
1749                         continue;
1750                 }
1751                 /* does a VRF id match? */
1752                 fnd = 0;
1753                 if (inp->def_vrf_id == vrf_id)
1754                         fnd = 1;
1755
1756                 if (!fnd) {
1757                         SCTP_INP_RUNLOCK(inp);
1758                         continue;
1759                 }
1760                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1761                         if (laddr->ifa == NULL) {
1762                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1763                                     __func__);
1764                                 continue;
1765                         }
1766                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1767                             (void *)laddr->ifa);
1768                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1769                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1770                                 continue;
1771                         }
1772                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1773                                 /* possible, see if it matches */
1774                                 switch (nam->sa_family) {
1775 #ifdef INET
1776                                 case AF_INET:
1777                                         if (sin->sin_addr.s_addr ==
1778                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1779                                                 SCTP_INP_RUNLOCK(inp);
1780                                                 return (inp);
1781                                         }
1782                                         break;
1783 #endif
1784 #ifdef INET6
1785                                 case AF_INET6:
1786                                         intf_addr6 = &laddr->ifa->address.sin6;
1787                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1788                                             intf_addr6)) {
1789                                                 SCTP_INP_RUNLOCK(inp);
1790                                                 return (inp);
1791                                         }
1792                                         break;
1793 #endif
1794                                 }
1795                         }
1796                 }
1797                 SCTP_INP_RUNLOCK(inp);
1798         }
1799         return (NULL);
1800 }
1801
1802
1803 static struct sctp_inpcb *
1804 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1805 {
1806         struct sctppcbhead *head;
1807         struct sctp_inpcb *t_inp;
1808         int fnd;
1809
1810         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1811             SCTP_BASE_INFO(hashmark))];
1812         LIST_FOREACH(t_inp, head, sctp_hash) {
1813                 if (t_inp->sctp_lport != lport) {
1814                         continue;
1815                 }
1816                 /* is it in the VRF in question */
1817                 fnd = 0;
1818                 if (t_inp->def_vrf_id == vrf_id)
1819                         fnd = 1;
1820                 if (!fnd)
1821                         continue;
1822
1823                 /* This one is in use. */
1824                 /* check the v6/v4 binding issue */
1825                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1826                     SCTP_IPV6_V6ONLY(t_inp)) {
1827                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1828                                 /* collision in V6 space */
1829                                 return (t_inp);
1830                         } else {
1831                                 /* inp is BOUND_V4 no conflict */
1832                                 continue;
1833                         }
1834                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1835                         /* t_inp is bound v4 and v6, conflict always */
1836                         return (t_inp);
1837                 } else {
1838                         /* t_inp is bound only V4 */
1839                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1840                             SCTP_IPV6_V6ONLY(inp)) {
1841                                 /* no conflict */
1842                                 continue;
1843                         }
1844                         /* else fall through to conflict */
1845                 }
1846                 return (t_inp);
1847         }
1848         return (NULL);
1849 }
1850
1851
1852 int
1853 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1854 {
1855         /* For 1-2-1 with port reuse */
1856         struct sctppcbhead *head;
1857         struct sctp_inpcb *tinp, *ninp;
1858
1859         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1860                 /* only works with port reuse on */
1861                 return (-1);
1862         }
1863         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1864                 return (0);
1865         }
1866         SCTP_INP_RUNLOCK(inp);
1867         SCTP_INP_INFO_WLOCK();
1868         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1869             SCTP_BASE_INFO(hashmark))];
1870         /* Kick out all non-listeners to the TCP hash */
1871         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1872                 if (tinp->sctp_lport != inp->sctp_lport) {
1873                         continue;
1874                 }
1875                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1876                         continue;
1877                 }
1878                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1879                         continue;
1880                 }
1881                 if (SCTP_IS_LISTENING(tinp)) {
1882                         continue;
1883                 }
1884                 SCTP_INP_WLOCK(tinp);
1885                 LIST_REMOVE(tinp, sctp_hash);
1886                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1887                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1888                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1889                 SCTP_INP_WUNLOCK(tinp);
1890         }
1891         SCTP_INP_WLOCK(inp);
1892         /* Pull from where he was */
1893         LIST_REMOVE(inp, sctp_hash);
1894         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1895         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1896         LIST_INSERT_HEAD(head, inp, sctp_hash);
1897         SCTP_INP_WUNLOCK(inp);
1898         SCTP_INP_RLOCK(inp);
1899         SCTP_INP_INFO_WUNLOCK();
1900         return (0);
1901 }
1902
1903
1904 struct sctp_inpcb *
1905 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1906     uint32_t vrf_id)
1907 {
1908         /*
1909          * First we check the hash table to see if someone has this port
1910          * bound with just the port.
1911          */
1912         struct sctp_inpcb *inp;
1913         struct sctppcbhead *head;
1914         int lport;
1915         unsigned int i;
1916 #ifdef INET
1917         struct sockaddr_in *sin;
1918 #endif
1919 #ifdef INET6
1920         struct sockaddr_in6 *sin6;
1921 #endif
1922
1923         switch (nam->sa_family) {
1924 #ifdef INET
1925         case AF_INET:
1926                 sin = (struct sockaddr_in *)nam;
1927                 lport = sin->sin_port;
1928                 break;
1929 #endif
1930 #ifdef INET6
1931         case AF_INET6:
1932                 sin6 = (struct sockaddr_in6 *)nam;
1933                 lport = sin6->sin6_port;
1934                 break;
1935 #endif
1936         default:
1937                 return (NULL);
1938         }
1939         /*
1940          * I could cheat here and just cast to one of the types but we will
1941          * do it right. It also provides the check against an Unsupported
1942          * type too.
1943          */
1944         /* Find the head of the ALLADDR chain */
1945         if (have_lock == 0) {
1946                 SCTP_INP_INFO_RLOCK();
1947         }
1948         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1949             SCTP_BASE_INFO(hashmark))];
1950         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1951
1952         /*
1953          * If the TCP model exists it could be that the main listening
1954          * endpoint is gone but there still exists a connected socket for
1955          * this guy. If so we can return the first one that we find. This
1956          * may NOT be the correct one so the caller should be wary on the
1957          * returned INP. Currently the only caller that sets find_tcp_pool
1958          * is in bindx where we are verifying that a user CAN bind the
1959          * address. He either has bound it already, or someone else has, or
1960          * its open to bind, so this is good enough.
1961          */
1962         if (inp == NULL && find_tcp_pool) {
1963                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1964                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1965                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1966                         if (inp) {
1967                                 break;
1968                         }
1969                 }
1970         }
1971         if (inp) {
1972                 SCTP_INP_INCR_REF(inp);
1973         }
1974         if (have_lock == 0) {
1975                 SCTP_INP_INFO_RUNLOCK();
1976         }
1977         return (inp);
1978 }
1979
1980
1981 /*
1982  * Find an association for an endpoint with the pointer to whom you want to
1983  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1984  * need to change the *to to some other struct like a mbuf...
1985  */
1986 struct sctp_tcb *
1987 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1988     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1989     uint32_t vrf_id)
1990 {
1991         struct sctp_inpcb *inp = NULL;
1992         struct sctp_tcb *stcb;
1993
1994         SCTP_INP_INFO_RLOCK();
1995         if (find_tcp_pool) {
1996                 if (inp_p != NULL) {
1997                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1998                             vrf_id);
1999                 } else {
2000                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2001                             vrf_id);
2002                 }
2003                 if (stcb != NULL) {
2004                         SCTP_INP_INFO_RUNLOCK();
2005                         return (stcb);
2006                 }
2007         }
2008         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2009         if (inp_p != NULL) {
2010                 *inp_p = inp;
2011         }
2012         SCTP_INP_INFO_RUNLOCK();
2013         if (inp == NULL) {
2014                 return (NULL);
2015         }
2016         /*
2017          * ok, we have an endpoint, now lets find the assoc for it (if any)
2018          * we now place the source address or from in the to of the find
2019          * endpoint call. Since in reality this chain is used from the
2020          * inbound packet side.
2021          */
2022         if (inp_p != NULL) {
2023                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2024                     NULL);
2025         } else {
2026                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2027                     NULL);
2028         }
2029         return (stcb);
2030 }
2031
2032
2033 /*
2034  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2035  * find all addresses that the sender has specified in any address list. Each
2036  * address will be used to lookup the TCB and see if one exits.
2037  */
2038 static struct sctp_tcb *
2039 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2040     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2041     struct sockaddr *dst)
2042 {
2043         struct sctp_paramhdr *phdr, param_buf;
2044 #if defined(INET) || defined(INET6)
2045         struct sctp_tcb *stcb;
2046         uint16_t ptype;
2047 #endif
2048         uint16_t plen;
2049 #ifdef INET
2050         struct sockaddr_in sin4;
2051 #endif
2052 #ifdef INET6
2053         struct sockaddr_in6 sin6;
2054 #endif
2055
2056 #ifdef INET
2057         memset(&sin4, 0, sizeof(sin4));
2058         sin4.sin_len = sizeof(sin4);
2059         sin4.sin_family = AF_INET;
2060         sin4.sin_port = sh->src_port;
2061 #endif
2062 #ifdef INET6
2063         memset(&sin6, 0, sizeof(sin6));
2064         sin6.sin6_len = sizeof(sin6);
2065         sin6.sin6_family = AF_INET6;
2066         sin6.sin6_port = sh->src_port;
2067 #endif
2068
2069         offset += sizeof(struct sctp_init_chunk);
2070
2071         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2072         while (phdr != NULL) {
2073                 /* now we must see if we want the parameter */
2074 #if defined(INET) || defined(INET6)
2075                 ptype = ntohs(phdr->param_type);
2076 #endif
2077                 plen = ntohs(phdr->param_length);
2078                 if (plen == 0) {
2079                         break;
2080                 }
2081 #ifdef INET
2082                 if (ptype == SCTP_IPV4_ADDRESS &&
2083                     plen == sizeof(struct sctp_ipv4addr_param)) {
2084                         /* Get the rest of the address */
2085                         struct sctp_ipv4addr_param ip4_param, *p4;
2086
2087                         phdr = sctp_get_next_param(m, offset,
2088                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2089                         if (phdr == NULL) {
2090                                 return (NULL);
2091                         }
2092                         p4 = (struct sctp_ipv4addr_param *)phdr;
2093                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2094                         /* look it up */
2095                         stcb = sctp_findassociation_ep_addr(inp_p,
2096                             (struct sockaddr *)&sin4, netp, dst, NULL);
2097                         if (stcb != NULL) {
2098                                 return (stcb);
2099                         }
2100                 }
2101 #endif
2102 #ifdef INET6
2103                 if (ptype == SCTP_IPV6_ADDRESS &&
2104                     plen == sizeof(struct sctp_ipv6addr_param)) {
2105                         /* Get the rest of the address */
2106                         struct sctp_ipv6addr_param ip6_param, *p6;
2107
2108                         phdr = sctp_get_next_param(m, offset,
2109                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2110                         if (phdr == NULL) {
2111                                 return (NULL);
2112                         }
2113                         p6 = (struct sctp_ipv6addr_param *)phdr;
2114                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2115                         /* look it up */
2116                         stcb = sctp_findassociation_ep_addr(inp_p,
2117                             (struct sockaddr *)&sin6, netp, dst, NULL);
2118                         if (stcb != NULL) {
2119                                 return (stcb);
2120                         }
2121                 }
2122 #endif
2123                 offset += SCTP_SIZE32(plen);
2124                 phdr = sctp_get_next_param(m, offset, &param_buf,
2125                     sizeof(param_buf));
2126         }
2127         return (NULL);
2128 }
2129
2130 static struct sctp_tcb *
2131 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2132     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2133     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2134 {
2135         /*
2136          * Use my vtag to hash. If we find it we then verify the source addr
2137          * is in the assoc. If all goes well we save a bit on rec of a
2138          * packet.
2139          */
2140         struct sctpasochead *head;
2141         struct sctp_nets *net;
2142         struct sctp_tcb *stcb;
2143
2144         SCTP_INP_INFO_RLOCK();
2145         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2146             SCTP_BASE_INFO(hashasocmark))];
2147         LIST_FOREACH(stcb, head, sctp_asocs) {
2148                 SCTP_INP_RLOCK(stcb->sctp_ep);
2149                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2150                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2151                         continue;
2152                 }
2153                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2154                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2155                         continue;
2156                 }
2157                 SCTP_TCB_LOCK(stcb);
2158                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2159                 if (stcb->asoc.my_vtag == vtag) {
2160                         /* candidate */
2161                         if (stcb->rport != rport) {
2162                                 SCTP_TCB_UNLOCK(stcb);
2163                                 continue;
2164                         }
2165                         if (stcb->sctp_ep->sctp_lport != lport) {
2166                                 SCTP_TCB_UNLOCK(stcb);
2167                                 continue;
2168                         }
2169                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2170                                 SCTP_TCB_UNLOCK(stcb);
2171                                 continue;
2172                         }
2173                         /* RRS:Need toaddr check here */
2174                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2175                                 /* Endpoint does not own this address */
2176                                 SCTP_TCB_UNLOCK(stcb);
2177                                 continue;
2178                         }
2179                         if (remote_tag) {
2180                                 /*
2181                                  * If we have both vtags that's all we match
2182                                  * on
2183                                  */
2184                                 if (stcb->asoc.peer_vtag == remote_tag) {
2185                                         /*
2186                                          * If both tags match we consider it
2187                                          * conclusive and check NO
2188                                          * source/destination addresses
2189                                          */
2190                                         goto conclusive;
2191                                 }
2192                         }
2193                         if (skip_src_check) {
2194                 conclusive:
2195                                 if (from) {
2196                                         *netp = sctp_findnet(stcb, from);
2197                                 } else {
2198                                         *netp = NULL;   /* unknown */
2199                                 }
2200                                 if (inp_p)
2201                                         *inp_p = stcb->sctp_ep;
2202                                 SCTP_INP_INFO_RUNLOCK();
2203                                 return (stcb);
2204                         }
2205                         net = sctp_findnet(stcb, from);
2206                         if (net) {
2207                                 /* yep its him. */
2208                                 *netp = net;
2209                                 SCTP_STAT_INCR(sctps_vtagexpress);
2210                                 *inp_p = stcb->sctp_ep;
2211                                 SCTP_INP_INFO_RUNLOCK();
2212                                 return (stcb);
2213                         } else {
2214                                 /*
2215                                  * not him, this should only happen in rare
2216                                  * cases so I peg it.
2217                                  */
2218                                 SCTP_STAT_INCR(sctps_vtagbogus);
2219                         }
2220                 }
2221                 SCTP_TCB_UNLOCK(stcb);
2222         }
2223         SCTP_INP_INFO_RUNLOCK();
2224         return (NULL);
2225 }
2226
2227
2228 /*
2229  * Find an association with the pointer to the inbound IP packet. This can be
2230  * a IPv4 or IPv6 packet.
2231  */
2232 struct sctp_tcb *
2233 sctp_findassociation_addr(struct mbuf *m, int offset,
2234     struct sockaddr *src, struct sockaddr *dst,
2235     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2236     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2237 {
2238         struct sctp_tcb *stcb;
2239         struct sctp_inpcb *inp;
2240
2241         if (sh->v_tag) {
2242                 /* we only go down this path if vtag is non-zero */
2243                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2244                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2245                 if (stcb) {
2246                         return (stcb);
2247                 }
2248         }
2249
2250         if (inp_p) {
2251                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2252                     1, vrf_id);
2253                 inp = *inp_p;
2254         } else {
2255                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2256                     1, vrf_id);
2257         }
2258         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2259         if (stcb == NULL && inp) {
2260                 /* Found a EP but not this address */
2261                 if ((ch->chunk_type == SCTP_INITIATION) ||
2262                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2263                         /*-
2264                          * special hook, we do NOT return linp or an
2265                          * association that is linked to an existing
2266                          * association that is under the TCP pool (i.e. no
2267                          * listener exists). The endpoint finding routine
2268                          * will always find a listener before examining the
2269                          * TCP pool.
2270                          */
2271                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2272                                 if (inp_p) {
2273                                         *inp_p = NULL;
2274                                 }
2275                                 return (NULL);
2276                         }
2277                         stcb = sctp_findassociation_special_addr(m,
2278                             offset, sh, &inp, netp, dst);
2279                         if (inp_p != NULL) {
2280                                 *inp_p = inp;
2281                         }
2282                 }
2283         }
2284         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2285         return (stcb);
2286 }
2287
2288 /*
2289  * lookup an association by an ASCONF lookup address.
2290  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2291  */
2292 struct sctp_tcb *
2293 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2294     struct sockaddr *dst, struct sctphdr *sh,
2295     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2296 {
2297         struct sctp_tcb *stcb;
2298         union sctp_sockstore remote_store;
2299         struct sctp_paramhdr param_buf, *phdr;
2300         int ptype;
2301         int zero_address = 0;
2302 #ifdef INET
2303         struct sockaddr_in *sin;
2304 #endif
2305 #ifdef INET6
2306         struct sockaddr_in6 *sin6;
2307 #endif
2308
2309         memset(&remote_store, 0, sizeof(remote_store));
2310         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2311             &param_buf, sizeof(struct sctp_paramhdr));
2312         if (phdr == NULL) {
2313                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2314                     __func__);
2315                 return NULL;
2316         }
2317         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2318         /* get the correlation address */
2319         switch (ptype) {
2320 #ifdef INET6
2321         case SCTP_IPV6_ADDRESS:
2322                 {
2323                         /* ipv6 address param */
2324                         struct sctp_ipv6addr_param *p6, p6_buf;
2325
2326                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2327                                 return NULL;
2328                         }
2329                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2330                             offset + sizeof(struct sctp_asconf_chunk),
2331                             &p6_buf.ph, sizeof(p6_buf));
2332                         if (p6 == NULL) {
2333                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2334                                     __func__);
2335                                 return (NULL);
2336                         }
2337                         sin6 = &remote_store.sin6;
2338                         sin6->sin6_family = AF_INET6;
2339                         sin6->sin6_len = sizeof(*sin6);
2340                         sin6->sin6_port = sh->src_port;
2341                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2342                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2343                                 zero_address = 1;
2344                         break;
2345                 }
2346 #endif
2347 #ifdef INET
2348         case SCTP_IPV4_ADDRESS:
2349                 {
2350                         /* ipv4 address param */
2351                         struct sctp_ipv4addr_param *p4, p4_buf;
2352
2353                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2354                                 return NULL;
2355                         }
2356                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2357                             offset + sizeof(struct sctp_asconf_chunk),
2358                             &p4_buf.ph, sizeof(p4_buf));
2359                         if (p4 == NULL) {
2360                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2361                                     __func__);
2362                                 return (NULL);
2363                         }
2364                         sin = &remote_store.sin;
2365                         sin->sin_family = AF_INET;
2366                         sin->sin_len = sizeof(*sin);
2367                         sin->sin_port = sh->src_port;
2368                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2369                         if (sin->sin_addr.s_addr == INADDR_ANY)
2370                                 zero_address = 1;
2371                         break;
2372                 }
2373 #endif
2374         default:
2375                 /* invalid address param type */
2376                 return NULL;
2377         }
2378
2379         if (zero_address) {
2380                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2381                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2382                 if (stcb != NULL) {
2383                         SCTP_INP_DECR_REF(*inp_p);
2384                 }
2385         } else {
2386                 stcb = sctp_findassociation_ep_addr(inp_p,
2387                     &remote_store.sa, netp,
2388                     dst, NULL);
2389         }
2390         return (stcb);
2391 }
2392
2393
2394 /*
2395  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2396  * addresses. This way if we don't get a bind we by default pick a ephemeral
2397  * port with all addresses bound.
2398  */
2399 int
2400 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2401 {
2402         /*
2403          * we get called when a new endpoint starts up. We need to allocate
2404          * the sctp_inpcb structure from the zone and init it. Mark it as
2405          * unbound and find a port that we can use as an ephemeral with
2406          * INADDR_ANY. If the user binds later no problem we can then add in
2407          * the specific addresses. And setup the default parameters for the
2408          * EP.
2409          */
2410         int i, error;
2411         struct sctp_inpcb *inp;
2412         struct sctp_pcb *m;
2413         struct timeval time;
2414         sctp_sharedkey_t *null_key;
2415
2416         error = 0;
2417
2418         SCTP_INP_INFO_WLOCK();
2419         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2420         if (inp == NULL) {
2421                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2422                 SCTP_INP_INFO_WUNLOCK();
2423                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2424                 return (ENOBUFS);
2425         }
2426         /* zap it */
2427         memset(inp, 0, sizeof(*inp));
2428
2429         /* bump generations */
2430         /* setup socket pointers */
2431         inp->sctp_socket = so;
2432         inp->ip_inp.inp.inp_socket = so;
2433         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2434 #ifdef INET6
2435         if (INP_SOCKAF(so) == AF_INET6) {
2436                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2437                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2438                 }
2439                 if (MODULE_GLOBAL(ip6_v6only)) {
2440                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2441                 }
2442         }
2443 #endif
2444         inp->sctp_associd_counter = 1;
2445         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2446         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2447         inp->max_cwnd = 0;
2448         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2449         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2450         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2451         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2452         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2453         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2454         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2455         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2456         inp->idata_supported = 0;
2457
2458         inp->fibnum = so->so_fibnum;
2459         /* init the small hash table we use to track asocid <-> tcb */
2460         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2461         if (inp->sctp_asocidhash == NULL) {
2462                 crfree(inp->ip_inp.inp.inp_cred);
2463                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2464                 SCTP_INP_INFO_WUNLOCK();
2465                 return (ENOBUFS);
2466         }
2467         SCTP_INCR_EP_COUNT();
2468         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2469         SCTP_INP_INFO_WUNLOCK();
2470
2471         so->so_pcb = (caddr_t)inp;
2472
2473         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2474                 /* UDP style socket */
2475                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2476                     SCTP_PCB_FLAGS_UNBOUND);
2477                 /* Be sure it is NON-BLOCKING IO for UDP */
2478                 /* SCTP_SET_SO_NBIO(so); */
2479         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2480                 /* TCP style socket */
2481                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2482                     SCTP_PCB_FLAGS_UNBOUND);
2483                 /* Be sure we have blocking IO by default */
2484                 SOCK_LOCK(so);
2485                 SCTP_CLEAR_SO_NBIO(so);
2486                 SOCK_UNLOCK(so);
2487         } else {
2488                 /*
2489                  * unsupported socket type (RAW, etc)- in case we missed it
2490                  * in protosw
2491                  */
2492                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2493                 so->so_pcb = NULL;
2494                 crfree(inp->ip_inp.inp.inp_cred);
2495                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2496                 return (EOPNOTSUPP);
2497         }
2498         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2499                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2500                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2501         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2502                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2503                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2504         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2505                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2506                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2507         }
2508         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2509             &inp->sctp_hashmark);
2510         if (inp->sctp_tcbhash == NULL) {
2511                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2512                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2513                 so->so_pcb = NULL;
2514                 crfree(inp->ip_inp.inp.inp_cred);
2515                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2516                 return (ENOBUFS);
2517         }
2518         inp->def_vrf_id = vrf_id;
2519
2520         SCTP_INP_INFO_WLOCK();
2521         SCTP_INP_LOCK_INIT(inp);
2522         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2523         SCTP_INP_READ_INIT(inp);
2524         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2525         /* lock the new ep */
2526         SCTP_INP_WLOCK(inp);
2527
2528         /* add it to the info area */
2529         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2530         SCTP_INP_INFO_WUNLOCK();
2531
2532         TAILQ_INIT(&inp->read_queue);
2533         LIST_INIT(&inp->sctp_addr_list);
2534
2535         LIST_INIT(&inp->sctp_asoc_list);
2536
2537 #ifdef SCTP_TRACK_FREED_ASOCS
2538         /* TEMP CODE */
2539         LIST_INIT(&inp->sctp_asoc_free_list);
2540 #endif
2541         /* Init the timer structure for signature change */
2542         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2543         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2544
2545         /* now init the actual endpoint default data */
2546         m = &inp->sctp_ep;
2547
2548         /* setup the base timeout information */
2549         m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);      /* needed ? */
2550         m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);      /* needed ? */
2551         m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2552         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2553         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2554         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2555         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2556         /* all max/min max are in ms */
2557         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2558         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2559         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2560         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2561         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2562         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2563         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2564         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2565         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2566         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2567         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2568         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2569         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2570
2571         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2572         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2573         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2574         /* number of streams to pre-open on a association */
2575         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2576
2577         m->default_mtu = 0;
2578         /* Add adaptation cookie */
2579         m->adaptation_layer_indicator = 0;
2580         m->adaptation_layer_indicator_provided = 0;
2581
2582         /* seed random number generator */
2583         m->random_counter = 1;
2584         m->store_at = SCTP_SIGNATURE_SIZE;
2585         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2586         sctp_fill_random_store(m);
2587
2588         /* Minimum cookie size */
2589         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2590             sizeof(struct sctp_state_cookie);
2591         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2592
2593         /* Setup the initial secret */
2594         (void)SCTP_GETTIME_TIMEVAL(&time);
2595         m->time_of_secret_change = time.tv_sec;
2596
2597         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2598                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2599         }
2600         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2601
2602         /* How long is a cookie good for ? */
2603         m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2604         /*
2605          * Initialize authentication parameters
2606          */
2607         m->local_hmacs = sctp_default_supported_hmaclist();
2608         m->local_auth_chunks = sctp_alloc_chunklist();
2609         if (inp->asconf_supported) {
2610                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2611                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2612         }
2613         m->default_dscp = 0;
2614 #ifdef INET6
2615         m->default_flowlabel = 0;
2616 #endif
2617         m->port = 0;            /* encapsulation disabled by default */
2618         LIST_INIT(&m->shared_keys);
2619         /* add default NULL key as key id 0 */
2620         null_key = sctp_alloc_sharedkey();
2621         sctp_insert_sharedkey(&m->shared_keys, null_key);
2622         SCTP_INP_WUNLOCK(inp);
2623 #ifdef SCTP_LOG_CLOSING
2624         sctp_log_closing(inp, NULL, 12);
2625 #endif
2626         return (error);
2627 }
2628
2629
2630 void
2631 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2632     struct sctp_tcb *stcb)
2633 {
2634         struct sctp_nets *net;
2635         uint16_t lport, rport;
2636         struct sctppcbhead *head;
2637         struct sctp_laddr *laddr, *oladdr;
2638
2639         atomic_add_int(&stcb->asoc.refcnt, 1);
2640         SCTP_TCB_UNLOCK(stcb);
2641         SCTP_INP_INFO_WLOCK();
2642         SCTP_INP_WLOCK(old_inp);
2643         SCTP_INP_WLOCK(new_inp);
2644         SCTP_TCB_LOCK(stcb);
2645         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2646
2647         new_inp->sctp_ep.time_of_secret_change =
2648             old_inp->sctp_ep.time_of_secret_change;
2649         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2650             sizeof(old_inp->sctp_ep.secret_key));
2651         new_inp->sctp_ep.current_secret_number =
2652             old_inp->sctp_ep.current_secret_number;
2653         new_inp->sctp_ep.last_secret_number =
2654             old_inp->sctp_ep.last_secret_number;
2655         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2656
2657         /* make it so new data pours into the new socket */
2658         stcb->sctp_socket = new_inp->sctp_socket;
2659         stcb->sctp_ep = new_inp;
2660
2661         /* Copy the port across */
2662         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2663         rport = stcb->rport;
2664         /* Pull the tcb from the old association */
2665         LIST_REMOVE(stcb, sctp_tcbhash);
2666         LIST_REMOVE(stcb, sctp_tcblist);
2667         if (stcb->asoc.in_asocid_hash) {
2668                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2669         }
2670         /* Now insert the new_inp into the TCP connected hash */
2671         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2672
2673         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2674         /* Its safe to access */
2675         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2676
2677         /* Now move the tcb into the endpoint list */
2678         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2679         /*
2680          * Question, do we even need to worry about the ep-hash since we
2681          * only have one connection? Probably not :> so lets get rid of it
2682          * and not suck up any kernel memory in that.
2683          */
2684         if (stcb->asoc.in_asocid_hash) {
2685                 struct sctpasochead *lhd;
2686
2687                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2688                     new_inp->hashasocidmark)];
2689                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2690         }
2691         /* Ok. Let's restart timer. */
2692         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2693                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2694                     stcb, net);
2695         }
2696
2697         SCTP_INP_INFO_WUNLOCK();
2698         if (new_inp->sctp_tcbhash != NULL) {
2699                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2700                 new_inp->sctp_tcbhash = NULL;
2701         }
2702         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2703                 /* Subset bound, so copy in the laddr list from the old_inp */
2704                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2705                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2706                         if (laddr == NULL) {
2707                                 /*
2708                                  * Gak, what can we do? This assoc is really
2709                                  * HOSED. We probably should send an abort
2710                                  * here.
2711                                  */
2712                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2713                                 continue;
2714                         }
2715                         SCTP_INCR_LADDR_COUNT();
2716                         memset(laddr, 0, sizeof(*laddr));
2717                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2718                         laddr->ifa = oladdr->ifa;
2719                         atomic_add_int(&laddr->ifa->refcount, 1);
2720                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2721                             sctp_nxt_addr);
2722                         new_inp->laddr_count++;
2723                         if (oladdr == stcb->asoc.last_used_address) {
2724                                 stcb->asoc.last_used_address = laddr;
2725                         }
2726                 }
2727         }
2728         /*
2729          * Now any running timers need to be adjusted since we really don't
2730          * care if they are running or not just blast in the new_inp into
2731          * all of them.
2732          */
2733
2734         stcb->asoc.dack_timer.ep = (void *)new_inp;
2735         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2736         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2737         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2738         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2739         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2740         /* now what about the nets? */
2741         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2742                 net->pmtu_timer.ep = (void *)new_inp;
2743                 net->hb_timer.ep = (void *)new_inp;
2744                 net->rxt_timer.ep = (void *)new_inp;
2745         }
2746         SCTP_INP_WUNLOCK(new_inp);
2747         SCTP_INP_WUNLOCK(old_inp);
2748 }
2749
2750 /*
2751  * insert an laddr entry with the given ifa for the desired list
2752  */
2753 static int
2754 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2755 {
2756         struct sctp_laddr *laddr;
2757
2758         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2759         if (laddr == NULL) {
2760                 /* out of memory? */
2761                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2762                 return (EINVAL);
2763         }
2764         SCTP_INCR_LADDR_COUNT();
2765         memset(laddr, 0, sizeof(*laddr));
2766         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2767         laddr->ifa = ifa;
2768         laddr->action = act;
2769         atomic_add_int(&ifa->refcount, 1);
2770         /* insert it */
2771         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2772
2773         return (0);
2774 }
2775
2776 /*
2777  * Remove an laddr entry from the local address list (on an assoc)
2778  */
2779 static void
2780 sctp_remove_laddr(struct sctp_laddr *laddr)
2781 {
2782
2783         /* remove from the list */
2784         LIST_REMOVE(laddr, sctp_nxt_addr);
2785         sctp_free_ifa(laddr->ifa);
2786         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2787         SCTP_DECR_LADDR_COUNT();
2788 }
2789
2790
2791
2792 /* sctp_ifap is used to bypass normal local address validation checks */
2793 int
2794 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2795     struct sctp_ifa *sctp_ifap, struct thread *p)
2796 {
2797         /* bind a ep to a socket address */
2798         struct sctppcbhead *head;
2799         struct sctp_inpcb *inp, *inp_tmp;
2800         struct inpcb *ip_inp;
2801         int port_reuse_active = 0;
2802         int bindall;
2803         uint16_t lport;
2804         int error;
2805         uint32_t vrf_id;
2806
2807         lport = 0;
2808         bindall = 1;
2809         inp = (struct sctp_inpcb *)so->so_pcb;
2810         ip_inp = (struct inpcb *)so->so_pcb;
2811 #ifdef SCTP_DEBUG
2812         if (addr) {
2813                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2814                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2815                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2816                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2817         }
2818 #endif
2819         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2820                 /* already did a bind, subsequent binds NOT allowed ! */
2821                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2822                 return (EINVAL);
2823         }
2824 #ifdef INVARIANTS
2825         if (p == NULL)
2826                 panic("null proc/thread");
2827 #endif
2828         if (addr != NULL) {
2829                 switch (addr->sa_family) {
2830 #ifdef INET
2831                 case AF_INET:
2832                         {
2833                                 struct sockaddr_in *sin;
2834
2835                                 /* IPV6_V6ONLY socket? */
2836                                 if (SCTP_IPV6_V6ONLY(inp)) {
2837                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2838                                         return (EINVAL);
2839                                 }
2840                                 if (addr->sa_len != sizeof(*sin)) {
2841                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2842                                         return (EINVAL);
2843                                 }
2844
2845                                 sin = (struct sockaddr_in *)addr;
2846                                 lport = sin->sin_port;
2847                                 /*
2848                                  * For LOOPBACK the prison_local_ip4() call
2849                                  * will transmute the ip address to the
2850                                  * proper value.
2851                                  */
2852                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2853                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2854                                         return (error);
2855                                 }
2856                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2857                                         bindall = 0;
2858                                 }
2859                                 break;
2860                         }
2861 #endif
2862 #ifdef INET6
2863                 case AF_INET6:
2864                         {
2865                                 /*
2866                                  * Only for pure IPv6 Address. (No IPv4
2867                                  * Mapped!)
2868                                  */
2869                                 struct sockaddr_in6 *sin6;
2870
2871                                 sin6 = (struct sockaddr_in6 *)addr;
2872
2873                                 if (addr->sa_len != sizeof(*sin6)) {
2874                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2875                                         return (EINVAL);
2876                                 }
2877                                 lport = sin6->sin6_port;
2878                                 /*
2879                                  * For LOOPBACK the prison_local_ip6() call
2880                                  * will transmute the ipv6 address to the
2881                                  * proper value.
2882                                  */
2883                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2884                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2885                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2886                                         return (error);
2887                                 }
2888                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2889                                         bindall = 0;
2890                                         /* KAME hack: embed scopeid */
2891                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2892                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2893                                                 return (EINVAL);
2894                                         }
2895                                 }
2896                                 /* this must be cleared for ifa_ifwithaddr() */
2897                                 sin6->sin6_scope_id = 0;
2898                                 break;
2899                         }
2900 #endif
2901                 default:
2902                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2903                         return (EAFNOSUPPORT);
2904                 }
2905         }
2906         SCTP_INP_INFO_WLOCK();
2907         SCTP_INP_WLOCK(inp);
2908         /* Setup a vrf_id to be the default for the non-bind-all case. */
2909         vrf_id = inp->def_vrf_id;
2910
2911         /* increase our count due to the unlock we do */
2912         SCTP_INP_INCR_REF(inp);
2913         if (lport) {
2914                 /*
2915                  * Did the caller specify a port? if so we must see if an ep
2916                  * already has this one bound.
2917                  */
2918                 /* got to be root to get at low ports */
2919                 if (ntohs(lport) < IPPORT_RESERVED) {
2920                         if ((p != NULL) && ((error =
2921                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2922                             ) != 0)) {
2923                                 SCTP_INP_DECR_REF(inp);
2924                                 SCTP_INP_WUNLOCK(inp);
2925                                 SCTP_INP_INFO_WUNLOCK();
2926                                 return (error);
2927                         }
2928                 }
2929                 SCTP_INP_WUNLOCK(inp);
2930                 if (bindall) {
2931                         vrf_id = inp->def_vrf_id;
2932                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2933                         if (inp_tmp != NULL) {
2934                                 /*
2935                                  * lock guy returned and lower count note
2936                                  * that we are not bound so inp_tmp should
2937                                  * NEVER be inp. And it is this inp
2938                                  * (inp_tmp) that gets the reference bump,
2939                                  * so we must lower it.
2940                                  */
2941                                 SCTP_INP_DECR_REF(inp_tmp);
2942                                 /* unlock info */
2943                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2944                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2945                                         /*
2946                                          * Ok, must be one-2-one and
2947                                          * allowing port re-use
2948                                          */
2949                                         port_reuse_active = 1;
2950                                         goto continue_anyway;
2951                                 }
2952                                 SCTP_INP_DECR_REF(inp);
2953                                 SCTP_INP_INFO_WUNLOCK();
2954                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2955                                 return (EADDRINUSE);
2956                         }
2957                 } else {
2958                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2959                         if (inp_tmp != NULL) {
2960                                 /*
2961                                  * lock guy returned and lower count note
2962                                  * that we are not bound so inp_tmp should
2963                                  * NEVER be inp. And it is this inp
2964                                  * (inp_tmp) that gets the reference bump,
2965                                  * so we must lower it.
2966                                  */
2967                                 SCTP_INP_DECR_REF(inp_tmp);
2968                                 /* unlock info */
2969                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2970                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2971                                         /*
2972                                          * Ok, must be one-2-one and
2973                                          * allowing port re-use
2974                                          */
2975                                         port_reuse_active = 1;
2976                                         goto continue_anyway;
2977                                 }
2978                                 SCTP_INP_DECR_REF(inp);
2979                                 SCTP_INP_INFO_WUNLOCK();
2980                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2981                                 return (EADDRINUSE);
2982                         }
2983                 }
2984 continue_anyway:
2985                 SCTP_INP_WLOCK(inp);
2986                 if (bindall) {
2987                         /* verify that no lport is not used by a singleton */
2988                         if ((port_reuse_active == 0) &&
2989                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2990                                 /* Sorry someone already has this one bound */
2991                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2992                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2993                                         port_reuse_active = 1;
2994                                 } else {
2995                                         SCTP_INP_DECR_REF(inp);
2996                                         SCTP_INP_WUNLOCK(inp);
2997                                         SCTP_INP_INFO_WUNLOCK();
2998                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2999                                         return (EADDRINUSE);
3000                                 }
3001                         }
3002                 }
3003         } else {
3004                 uint16_t first, last, candidate;
3005                 uint16_t count;
3006                 int done;
3007
3008                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3009                         first = MODULE_GLOBAL(ipport_hifirstauto);
3010                         last = MODULE_GLOBAL(ipport_hilastauto);
3011                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3012                         if (p && (error =
3013                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3014                             )) {
3015                                 SCTP_INP_DECR_REF(inp);
3016                                 SCTP_INP_WUNLOCK(inp);
3017                                 SCTP_INP_INFO_WUNLOCK();
3018                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3019                                 return (error);
3020                         }
3021                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3022                         last = MODULE_GLOBAL(ipport_lowlastauto);
3023                 } else {
3024                         first = MODULE_GLOBAL(ipport_firstauto);
3025                         last = MODULE_GLOBAL(ipport_lastauto);
3026                 }
3027                 if (first > last) {
3028                         uint16_t temp;
3029
3030                         temp = first;
3031                         first = last;
3032                         last = temp;
3033                 }
3034                 count = last - first + 1;       /* number of candidates */
3035                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3036
3037                 done = 0;
3038                 while (!done) {
3039                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3040                                 done = 1;
3041                         }
3042                         if (!done) {
3043                                 if (--count == 0) {
3044                                         SCTP_INP_DECR_REF(inp);
3045                                         SCTP_INP_WUNLOCK(inp);
3046                                         SCTP_INP_INFO_WUNLOCK();
3047                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3048                                         return (EADDRINUSE);
3049                                 }
3050                                 if (candidate == last)
3051                                         candidate = first;
3052                                 else
3053                                         candidate = candidate + 1;
3054                         }
3055                 }
3056                 lport = htons(candidate);
3057         }
3058         SCTP_INP_DECR_REF(inp);
3059         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3060             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3061                 /*
3062                  * this really should not happen. The guy did a non-blocking
3063                  * bind and then did a close at the same time.
3064                  */
3065                 SCTP_INP_WUNLOCK(inp);
3066                 SCTP_INP_INFO_WUNLOCK();
3067                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3068                 return (EINVAL);
3069         }
3070         /* ok we look clear to give out this port, so lets setup the binding */
3071         if (bindall) {
3072                 /* binding to all addresses, so just set in the proper flags */
3073                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3074                 /* set the automatic addr changes from kernel flag */
3075                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3076                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3077                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3078                 } else {
3079                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3080                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3081                 }
3082                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3083                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3084                 } else {
3085                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3086                 }
3087                 /*
3088                  * set the automatic mobility_base from kernel flag (by
3089                  * micchie)
3090                  */
3091                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3092                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3093                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3094                 } else {
3095                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3096                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3097                 }
3098                 /*
3099                  * set the automatic mobility_fasthandoff from kernel flag
3100                  * (by micchie)
3101                  */
3102                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3105                 } else {
3106                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3107                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3108                 }
3109         } else {
3110                 /*
3111                  * bind specific, make sure flags is off and add a new
3112                  * address structure to the sctp_addr_list inside the ep
3113                  * structure.
3114                  *
3115                  * We will need to allocate one and insert it at the head.
3116                  * The socketopt call can just insert new addresses in there
3117                  * as well. It will also have to do the embed scope kame
3118                  * hack too (before adding).
3119                  */
3120                 struct sctp_ifa *ifa;
3121                 union sctp_sockstore store;
3122
3123                 memset(&store, 0, sizeof(store));
3124                 switch (addr->sa_family) {
3125 #ifdef INET
3126                 case AF_INET:
3127                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3128                         store.sin.sin_port = 0;
3129                         break;
3130 #endif
3131 #ifdef INET6
3132                 case AF_INET6:
3133                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3134                         store.sin6.sin6_port = 0;
3135                         break;
3136 #endif
3137                 default:
3138                         break;
3139                 }
3140                 /*
3141                  * first find the interface with the bound address need to
3142                  * zero out the port to find the address! yuck! can't do
3143                  * this earlier since need port for sctp_pcb_findep()
3144                  */
3145                 if (sctp_ifap != NULL) {
3146                         ifa = sctp_ifap;
3147                 } else {
3148                         /*
3149                          * Note for BSD we hit here always other O/S's will
3150                          * pass things in via the sctp_ifap argument.
3151                          */
3152                         ifa = sctp_find_ifa_by_addr(&store.sa,
3153                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3154                 }
3155                 if (ifa == NULL) {
3156                         /* Can't find an interface with that address */
3157                         SCTP_INP_WUNLOCK(inp);
3158                         SCTP_INP_INFO_WUNLOCK();
3159                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3160                         return (EADDRNOTAVAIL);
3161                 }
3162 #ifdef INET6
3163                 if (addr->sa_family == AF_INET6) {
3164                         /* GAK, more FIXME IFA lock? */
3165                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3166                                 /* Can't bind a non-existent addr. */
3167                                 SCTP_INP_WUNLOCK(inp);
3168                                 SCTP_INP_INFO_WUNLOCK();
3169                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3170                                 return (EINVAL);
3171                         }
3172                 }
3173 #endif
3174                 /* we're not bound all */
3175                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3176                 /* allow bindx() to send ASCONF's for binding changes */
3177                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3178                 /* clear automatic addr changes from kernel flag */
3179                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3180
3181                 /* add this address to the endpoint list */
3182                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3183                 if (error != 0) {
3184                         SCTP_INP_WUNLOCK(inp);
3185                         SCTP_INP_INFO_WUNLOCK();
3186                         return (error);
3187                 }
3188                 inp->laddr_count++;
3189         }
3190         /* find the bucket */
3191         if (port_reuse_active) {
3192                 /* Put it into tcp 1-2-1 hash */
3193                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3194                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3195         } else {
3196                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3197         }
3198         /* put it in the bucket */
3199         LIST_INSERT_HEAD(head, inp, sctp_hash);
3200         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3201             (void *)head, ntohs(lport), port_reuse_active);
3202         /* set in the port */
3203         inp->sctp_lport = lport;
3204
3205         /* turn off just the unbound flag */
3206         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3207         SCTP_INP_WUNLOCK(inp);
3208         SCTP_INP_INFO_WUNLOCK();
3209         return (0);
3210 }
3211
3212
3213 static void
3214 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3215 {
3216         struct sctp_iterator *it, *nit;
3217
3218         /*
3219          * We enter with the only the ITERATOR_LOCK in place and a write
3220          * lock on the inp_info stuff.
3221          */
3222         it = sctp_it_ctl.cur_it;
3223         if (it && (it->vn != curvnet)) {
3224                 /* Its not looking at our VNET */
3225                 return;
3226         }
3227         if (it && (it->inp == inp)) {
3228                 /*
3229                  * This is tricky and we hold the iterator lock, but when it
3230                  * returns and gets the lock (when we release it) the
3231                  * iterator will try to operate on inp. We need to stop that
3232                  * from happening. But of course the iterator has a
3233                  * reference on the stcb and inp. We can mark it and it will
3234                  * stop.
3235                  *
3236                  * If its a single iterator situation, we set the end
3237                  * iterator flag. Otherwise we set the iterator to go to the
3238                  * next inp.
3239                  *
3240                  */
3241                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3242                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3243                 } else {
3244                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3245                 }
3246         }
3247         /*
3248          * Now go through and remove any single reference to our inp that
3249          * may be still pending on the list
3250          */
3251         SCTP_IPI_ITERATOR_WQ_LOCK();
3252         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3253                 if (it->vn != curvnet) {
3254                         continue;
3255                 }
3256                 if (it->inp == inp) {
3257                         /* This one points to me is it inp specific? */
3258                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3259                                 /* Remove and free this one */
3260                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3261                                     it, sctp_nxt_itr);
3262                                 if (it->function_atend != NULL) {
3263                                         (*it->function_atend) (it->pointer, it->val);
3264                                 }
3265                                 SCTP_FREE(it, SCTP_M_ITER);
3266                         } else {
3267                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3268                                 if (it->inp) {
3269                                         SCTP_INP_INCR_REF(it->inp);
3270                                 }
3271                         }
3272                         /*
3273                          * When its put in the refcnt is incremented so decr
3274                          * it
3275                          */
3276                         SCTP_INP_DECR_REF(inp);
3277                 }
3278         }
3279         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3280 }
3281
3282 /* release sctp_inpcb unbind the port */
3283 void
3284 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3285 {
3286         /*
3287          * Here we free a endpoint. We must find it (if it is in the Hash
3288          * table) and remove it from there. Then we must also find it in the
3289          * overall list and remove it from there. After all removals are
3290          * complete then any timer has to be stopped. Then start the actual
3291          * freeing. a) Any local lists. b) Any associations. c) The hash of
3292          * all associations. d) finally the ep itself.
3293          */
3294         struct sctp_tcb *asoc, *nasoc;
3295         struct sctp_laddr *laddr, *nladdr;
3296         struct inpcb *ip_pcb;
3297         struct socket *so;
3298         int being_refed = 0;
3299         struct sctp_queued_to_read *sq, *nsq;
3300         int cnt;
3301         sctp_sharedkey_t *shared_key, *nshared_key;
3302
3303
3304 #ifdef SCTP_LOG_CLOSING
3305         sctp_log_closing(inp, NULL, 0);
3306 #endif
3307         SCTP_ITERATOR_LOCK();
3308         /* mark any iterators on the list or being processed */
3309         sctp_iterator_inp_being_freed(inp);
3310         SCTP_ITERATOR_UNLOCK();
3311         so = inp->sctp_socket;
3312         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3313                 /* been here before.. eeks.. get out of here */
3314                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3315 #ifdef SCTP_LOG_CLOSING
3316                 sctp_log_closing(inp, NULL, 1);
3317 #endif
3318                 return;
3319         }
3320         SCTP_ASOC_CREATE_LOCK(inp);
3321         SCTP_INP_INFO_WLOCK();
3322
3323         SCTP_INP_WLOCK(inp);
3324         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3325                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3326                 /* socket is gone, so no more wakeups allowed */
3327                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3328                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3329                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3330
3331         }
3332         /* First time through we have the socket lock, after that no more. */
3333         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3334             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3335
3336         if (inp->control) {
3337                 sctp_m_freem(inp->control);
3338                 inp->control = NULL;
3339         }
3340         if (inp->pkt) {
3341                 sctp_m_freem(inp->pkt);
3342                 inp->pkt = NULL;
3343         }
3344         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3345                                          * here but I will be nice :> (i.e.
3346                                          * ip_pcb = ep;) */
3347         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3348                 int cnt_in_sd;
3349
3350                 cnt_in_sd = 0;
3351                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3352                         SCTP_TCB_LOCK(asoc);
3353                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3354                                 /* Skip guys being freed */
3355                                 cnt_in_sd++;
3356                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3357                                         /*
3358                                          * Special case - we did not start a
3359                                          * kill timer on the asoc due to it
3360                                          * was not closed. So go ahead and
3361                                          * start it now.
3362                                          */
3363                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3364                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3365                                 }
3366                                 SCTP_TCB_UNLOCK(asoc);
3367                                 continue;
3368                         }
3369                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3370                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3371                             (asoc->asoc.total_output_queue_size == 0)) {
3372                                 /*
3373                                  * If we have data in queue, we don't want
3374                                  * to just free since the app may have done,
3375                                  * send()/close or connect/send/close. And
3376                                  * it wants the data to get across first.
3377                                  */
3378                                 /* Just abandon things in the front states */
3379                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3380                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3381                                         cnt_in_sd++;
3382                                 }
3383                                 continue;
3384                         }
3385                         /* Disconnect the socket please */
3386                         asoc->sctp_socket = NULL;
3387                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3388                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3389                             (asoc->asoc.control_pdapi) ||
3390                             (asoc->asoc.size_on_all_streams > 0) ||
3391                             (so && (so->so_rcv.sb_cc > 0))) {
3392                                 /* Left with Data unread */
3393                                 struct mbuf *op_err;
3394
3395                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3396                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3397                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3398                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3399                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3400                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3401                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3402                                 }
3403                                 if (sctp_free_assoc(inp, asoc,
3404                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3405                                         cnt_in_sd++;
3406                                 }
3407                                 continue;
3408                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3409                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3410                             (asoc->asoc.stream_queue_cnt == 0)) {
3411                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3412                                         goto abort_anyway;
3413                                 }
3414                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3415                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3416                                         struct sctp_nets *netp;
3417
3418                                         /*
3419                                          * there is nothing queued to send,
3420                                          * so I send shutdown
3421                                          */
3422                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3423                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3424                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3425                                         }
3426                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3427                                         sctp_stop_timers_for_shutdown(asoc);
3428                                         if (asoc->asoc.alternate) {
3429                                                 netp = asoc->asoc.alternate;
3430                                         } else {
3431                                                 netp = asoc->asoc.primary_destination;
3432                                         }
3433                                         sctp_send_shutdown(asoc, netp);
3434                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3435                                             netp);
3436                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3437                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3438                                 }
3439                         } else {
3440                                 /* mark into shutdown pending */
3441                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3442                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3443                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3444                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3445                                 }
3446                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3447                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3448                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3449                                         struct mbuf *op_err;
3450
3451                         abort_anyway:
3452                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3453                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3454                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3455                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3456                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3457                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3458                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3459                                         }
3460                                         if (sctp_free_assoc(inp, asoc,
3461                                             SCTP_PCBFREE_NOFORCE,
3462                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3463                                                 cnt_in_sd++;
3464                                         }
3465                                         continue;
3466                                 } else {
3467                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3468                                 }
3469                         }
3470                         cnt_in_sd++;
3471                         SCTP_TCB_UNLOCK(asoc);
3472                 }
3473                 /* now is there some left in our SHUTDOWN state? */
3474                 if (cnt_in_sd) {
3475 #ifdef SCTP_LOG_CLOSING
3476                         sctp_log_closing(inp, NULL, 2);
3477 #endif
3478                         inp->sctp_socket = NULL;
3479                         SCTP_INP_WUNLOCK(inp);
3480                         SCTP_ASOC_CREATE_UNLOCK(inp);
3481                         SCTP_INP_INFO_WUNLOCK();
3482                         return;
3483                 }
3484         }
3485         inp->sctp_socket = NULL;
3486         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3487             SCTP_PCB_FLAGS_UNBOUND) {
3488                 /*
3489                  * ok, this guy has been bound. It's port is somewhere in
3490                  * the SCTP_BASE_INFO(hash table). Remove it!
3491                  */
3492                 LIST_REMOVE(inp, sctp_hash);
3493                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3494         }
3495
3496         /*
3497          * If there is a timer running to kill us, forget it, since it may
3498          * have a contest on the INP lock.. which would cause us to die ...
3499          */
3500         cnt = 0;
3501         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3502                 SCTP_TCB_LOCK(asoc);
3503                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3504                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3505                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3506                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3507                         }
3508                         cnt++;
3509                         SCTP_TCB_UNLOCK(asoc);
3510                         continue;
3511                 }
3512                 /* Free associations that are NOT killing us */
3513                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3514                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3515                         struct mbuf *op_err;
3516
3517                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3518                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3519                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3520                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3521                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3522                         cnt++;
3523                         SCTP_TCB_UNLOCK(asoc);
3524                         continue;
3525                 }
3526                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3527                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3528                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3529                 }
3530                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3531                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3532                         cnt++;
3533                 }
3534         }
3535         if (cnt) {
3536                 /* Ok we have someone out there that will kill us */
3537 #ifdef SCTP_LOG_CLOSING
3538                 sctp_log_closing(inp, NULL, 3);
3539 #endif
3540                 SCTP_INP_WUNLOCK(inp);
3541                 SCTP_ASOC_CREATE_UNLOCK(inp);
3542                 SCTP_INP_INFO_WUNLOCK();
3543                 return;
3544         }
3545         if (SCTP_INP_LOCK_CONTENDED(inp))
3546                 being_refed++;
3547         if (SCTP_INP_READ_CONTENDED(inp))
3548                 being_refed++;
3549         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3550                 being_refed++;
3551
3552         if ((inp->refcount) ||
3553             (being_refed) ||
3554             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3555 #ifdef SCTP_LOG_CLOSING
3556                 sctp_log_closing(inp, NULL, 4);
3557 #endif
3558                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3559                 SCTP_INP_WUNLOCK(inp);
3560                 SCTP_ASOC_CREATE_UNLOCK(inp);
3561                 SCTP_INP_INFO_WUNLOCK();
3562                 return;
3563         }
3564         inp->sctp_ep.signature_change.type = 0;
3565         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3566         /*
3567          * Remove it from the list .. last thing we need a lock for.
3568          */
3569         LIST_REMOVE(inp, sctp_list);
3570         SCTP_INP_WUNLOCK(inp);
3571         SCTP_ASOC_CREATE_UNLOCK(inp);
3572         SCTP_INP_INFO_WUNLOCK();
3573         /*
3574          * Now we release all locks. Since this INP cannot be found anymore
3575          * except possibly by the kill timer that might be running. We call
3576          * the drain function here. It should hit the case were it sees the
3577          * ACTIVE flag cleared and exit out freeing us to proceed and
3578          * destroy everything.
3579          */
3580         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3581                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3582         } else {
3583                 /* Probably un-needed */
3584                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3585         }
3586
3587 #ifdef SCTP_LOG_CLOSING
3588         sctp_log_closing(inp, NULL, 5);
3589 #endif
3590
3591
3592         if ((inp->sctp_asocidhash) != NULL) {
3593                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3594                 inp->sctp_asocidhash = NULL;
3595         }
3596         /* sa_ignore FREED_MEMORY */
3597         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3598                 /* Its only abandoned if it had data left */
3599                 if (sq->length)
3600                         SCTP_STAT_INCR(sctps_left_abandon);
3601
3602                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3603                 sctp_free_remote_addr(sq->whoFrom);
3604                 if (so)
3605                         so->so_rcv.sb_cc -= sq->length;
3606                 if (sq->data) {
3607                         sctp_m_freem(sq->data);
3608                         sq->data = NULL;
3609                 }
3610                 /*
3611                  * no need to free the net count, since at this point all
3612                  * assoc's are gone.
3613                  */
3614                 sctp_free_a_readq(NULL, sq);
3615         }
3616         /* Now the sctp_pcb things */
3617         /*
3618          * free each asoc if it is not already closed/free. we can't use the
3619          * macro here since le_next will get freed as part of the
3620          * sctp_free_assoc() call.
3621          */
3622         if (ip_pcb->inp_options) {
3623                 (void)sctp_m_free(ip_pcb->inp_options);
3624                 ip_pcb->inp_options = 0;
3625         }
3626
3627
3628 #ifdef INET6
3629         if (ip_pcb->inp_vflag & INP_IPV6) {
3630                 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3631         }
3632 #endif                          /* INET6 */
3633         ip_pcb->inp_vflag = 0;
3634         /* free up authentication fields */
3635         if (inp->sctp_ep.local_auth_chunks != NULL)
3636                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3637         if (inp->sctp_ep.local_hmacs != NULL)
3638                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3639
3640         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3641                 LIST_REMOVE(shared_key, next);
3642                 sctp_free_sharedkey(shared_key);
3643                 /* sa_ignore FREED_MEMORY */
3644         }
3645
3646         /*
3647          * if we have an address list the following will free the list of
3648          * ifaddr's that are set into this ep. Again macro limitations here,
3649          * since the LIST_FOREACH could be a bad idea.
3650          */
3651         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3652                 sctp_remove_laddr(laddr);
3653         }
3654
3655 #ifdef SCTP_TRACK_FREED_ASOCS
3656         /* TEMP CODE */
3657         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3658                 LIST_REMOVE(asoc, sctp_tcblist);
3659                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3660                 SCTP_DECR_ASOC_COUNT();
3661         }
3662         /* *** END TEMP CODE *** */
3663 #endif
3664         /* Now lets see about freeing the EP hash table. */
3665         if (inp->sctp_tcbhash != NULL) {
3666                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3667                 inp->sctp_tcbhash = NULL;
3668         }
3669         /* Now we must put the ep memory back into the zone pool */
3670         crfree(inp->ip_inp.inp.inp_cred);
3671         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3672         SCTP_INP_LOCK_DESTROY(inp);
3673         SCTP_INP_READ_DESTROY(inp);
3674         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3675         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3676         SCTP_DECR_EP_COUNT();
3677 }
3678
3679
3680 struct sctp_nets *
3681 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3682 {
3683         struct sctp_nets *net;
3684
3685         /* locate the address */
3686         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3687                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3688                         return (net);
3689         }
3690         return (NULL);
3691 }
3692
3693
3694 int
3695 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3696 {
3697         struct sctp_ifa *sctp_ifa;
3698
3699         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3700         if (sctp_ifa) {
3701                 return (1);
3702         } else {
3703                 return (0);
3704         }
3705 }
3706
3707 /*
3708  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3709  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3710  * stats of stuff.
3711  */
3712 int
3713 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3714     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3715 {
3716         /*
3717          * The following is redundant to the same lines in the
3718          * sctp_aloc_assoc() but is needed since others call the add address
3719          * function
3720          */
3721         struct sctp_nets *net, *netfirst;
3722         int addr_inscope;
3723
3724         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3725             from);
3726         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3727
3728         netfirst = sctp_findnet(stcb, newaddr);
3729         if (netfirst) {
3730                 /*
3731                  * Lie and return ok, we don't want to make the association
3732                  * go away for this behavior. It will happen in the TCP
3733                  * model in a connected socket. It does not reach the hash
3734                  * table until after the association is built so it can't be
3735                  * found. Mark as reachable, since the initial creation will
3736                  * have been cleared and the NOT_IN_ASSOC flag will have
3737                  * been added... and we don't want to end up removing it
3738                  * back out.
3739                  */
3740                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3741                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3742                             SCTP_ADDR_UNCONFIRMED);
3743                 } else {
3744                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3745                 }
3746
3747                 return (0);
3748         }
3749         addr_inscope = 1;
3750         switch (newaddr->sa_family) {
3751 #ifdef INET
3752         case AF_INET:
3753                 {
3754                         struct sockaddr_in *sin;
3755
3756                         sin = (struct sockaddr_in *)newaddr;
3757                         if (sin->sin_addr.s_addr == 0) {
3758                                 /* Invalid address */
3759                                 return (-1);
3760                         }
3761                         /* zero out the zero area */
3762                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3763
3764                         /* assure len is set */
3765                         sin->sin_len = sizeof(struct sockaddr_in);
3766                         if (set_scope) {
3767                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3768                                         stcb->asoc.scope.ipv4_local_scope = 1;
3769                                 }
3770                         } else {
3771                                 /* Validate the address is in scope */
3772                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3773                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3774                                         addr_inscope = 0;
3775                                 }
3776                         }
3777                         break;
3778                 }
3779 #endif
3780 #ifdef INET6
3781         case AF_INET6:
3782                 {
3783                         struct sockaddr_in6 *sin6;
3784
3785                         sin6 = (struct sockaddr_in6 *)newaddr;
3786                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3787                                 /* Invalid address */
3788                                 return (-1);
3789                         }
3790                         /* assure len is set */
3791                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3792                         if (set_scope) {
3793                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3794                                         stcb->asoc.scope.loopback_scope = 1;
3795                                         stcb->asoc.scope.local_scope = 0;
3796                                         stcb->asoc.scope.ipv4_local_scope = 1;
3797                                         stcb->asoc.scope.site_scope = 1;
3798                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3799                                         /*
3800                                          * If the new destination is a
3801                                          * LINK_LOCAL we must have common
3802                                          * site scope. Don't set the local
3803                                          * scope since we may not share all
3804                                          * links, only loopback can do this.
3805                                          * Links on the local network would
3806                                          * also be on our private network
3807                                          * for v4 too.
3808                                          */
3809                                         stcb->asoc.scope.ipv4_local_scope = 1;
3810                                         stcb->asoc.scope.site_scope = 1;
3811                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3812                                         /*
3813                                          * If the new destination is
3814                                          * SITE_LOCAL then we must have site
3815                                          * scope in common.
3816                                          */
3817                                         stcb->asoc.scope.site_scope = 1;
3818                                 }
3819                         } else {
3820                                 /* Validate the address is in scope */
3821                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3822                                     (stcb->asoc.scope.loopback_scope == 0)) {
3823                                         addr_inscope = 0;
3824                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3825                                     (stcb->asoc.scope.local_scope == 0)) {
3826                                         addr_inscope = 0;
3827                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3828                                     (stcb->asoc.scope.site_scope == 0)) {
3829                                         addr_inscope = 0;
3830                                 }
3831                         }
3832                         break;
3833                 }
3834 #endif
3835         default:
3836                 /* not supported family type */
3837                 return (-1);
3838         }
3839         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3840         if (net == NULL) {
3841                 return (-1);
3842         }
3843         SCTP_INCR_RADDR_COUNT();
3844         memset(net, 0, sizeof(struct sctp_nets));
3845         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3846         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3847         switch (newaddr->sa_family) {
3848 #ifdef INET
3849         case AF_INET:
3850                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3851                 break;
3852 #endif
3853 #ifdef INET6
3854         case AF_INET6:
3855                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3856                 break;
3857 #endif
3858         default:
3859                 break;
3860         }
3861         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3862         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3863                 stcb->asoc.scope.loopback_scope = 1;
3864                 stcb->asoc.scope.ipv4_local_scope = 1;
3865                 stcb->asoc.scope.local_scope = 0;
3866                 stcb->asoc.scope.site_scope = 1;
3867                 addr_inscope = 1;
3868         }
3869         net->failure_threshold = stcb->asoc.def_net_failure;
3870         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3871         if (addr_inscope == 0) {
3872                 net->dest_state = (SCTP_ADDR_REACHABLE |
3873                     SCTP_ADDR_OUT_OF_SCOPE);
3874         } else {
3875                 if (from == SCTP_ADDR_IS_CONFIRMED)
3876                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3877                         net->dest_state = SCTP_ADDR_REACHABLE;
3878                 else
3879                         net->dest_state = SCTP_ADDR_REACHABLE |
3880                             SCTP_ADDR_UNCONFIRMED;
3881         }
3882         /*
3883          * We set this to 0, the timer code knows that this means its an
3884          * initial value
3885          */
3886         net->rto_needed = 1;
3887         net->RTO = 0;
3888         net->RTO_measured = 0;
3889         stcb->asoc.numnets++;
3890         net->ref_count = 1;
3891         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3892         net->port = port;
3893         net->dscp = stcb->asoc.default_dscp;
3894 #ifdef INET6
3895         net->flowlabel = stcb->asoc.default_flowlabel;
3896 #endif
3897         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3898                 net->dest_state |= SCTP_ADDR_NOHB;
3899         } else {
3900                 net->dest_state &= ~SCTP_ADDR_NOHB;
3901         }
3902         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3903                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3904         } else {
3905                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3906         }
3907         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3908         /* Init the timer structure */
3909         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3910         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3911         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3912
3913         /* Now generate a route for this guy */
3914 #ifdef INET6
3915         /* KAME hack: embed scopeid */
3916         if (newaddr->sa_family == AF_INET6) {
3917                 struct sockaddr_in6 *sin6;
3918
3919                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3920                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3921                 sin6->sin6_scope_id = 0;
3922         }
3923 #endif
3924         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3925             stcb->asoc.vrf_id,
3926             stcb->sctp_ep->fibnum);
3927
3928         net->src_addr_selected = 0;
3929         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3930                 /* Get source address */
3931                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3932                     stcb,
3933                     (sctp_route_t *)&net->ro,
3934                     net,
3935                     0,
3936                     stcb->asoc.vrf_id);
3937                 if (stcb->asoc.default_mtu > 0) {
3938                         net->mtu = stcb->asoc.default_mtu;
3939                         switch (net->ro._l_addr.sa.sa_family) {
3940 #ifdef INET
3941                         case AF_INET:
3942                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3943                                 break;
3944 #endif
3945 #ifdef INET6
3946                         case AF_INET6:
3947                                 net->mtu += SCTP_MIN_OVERHEAD;
3948                                 break;
3949 #endif
3950                         default:
3951                                 break;
3952                         }
3953 #if defined(INET) || defined(INET6)
3954                         if (net->port) {
3955                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3956                         }
3957 #endif
3958                 } else if (net->ro._s_addr != NULL) {
3959                         uint32_t imtu, rmtu, hcmtu;
3960
3961                         net->src_addr_selected = 1;
3962                         /* Now get the interface MTU */
3963                         if (net->ro._s_addr->ifn_p != NULL) {
3964                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3965                         } else {
3966                                 imtu = 0;
3967                         }
3968                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3969                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3970                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3971                 }
3972         }
3973         if (net->mtu == 0) {
3974                 if (stcb->asoc.default_mtu > 0) {
3975                         net->mtu = stcb->asoc.default_mtu;
3976                         switch (net->ro._l_addr.sa.sa_family) {
3977 #ifdef INET
3978                         case AF_INET:
3979                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3980                                 break;
3981 #endif
3982 #ifdef INET6
3983                         case AF_INET6:
3984                                 net->mtu += SCTP_MIN_OVERHEAD;
3985                                 break;
3986 #endif
3987                         default:
3988                                 break;
3989                         }
3990 #if defined(INET) || defined(INET6)
3991                         if (net->port) {
3992                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3993                         }
3994 #endif
3995                 } else {
3996                         switch (newaddr->sa_family) {
3997 #ifdef INET
3998                         case AF_INET:
3999                                 net->mtu = SCTP_DEFAULT_MTU;
4000                                 break;
4001 #endif
4002 #ifdef INET6
4003                         case AF_INET6:
4004                                 net->mtu = 1280;
4005                                 break;
4006 #endif
4007                         default:
4008                                 break;
4009                         }
4010                 }
4011         }
4012 #if defined(INET) || defined(INET6)
4013         if (net->port) {
4014                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4015         }
4016 #endif
4017         if (from == SCTP_ALLOC_ASOC) {
4018                 stcb->asoc.smallest_mtu = net->mtu;
4019         }
4020         if (stcb->asoc.smallest_mtu > net->mtu) {
4021                 sctp_pathmtu_adjustment(stcb, net->mtu);
4022         }
4023 #ifdef INET6
4024         if (newaddr->sa_family == AF_INET6) {
4025                 struct sockaddr_in6 *sin6;
4026
4027                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4028                 (void)sa6_recoverscope(sin6);
4029         }
4030 #endif
4031
4032         /* JRS - Use the congestion control given in the CC module */
4033         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4034                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4035
4036         /*
4037          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4038          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4039          */
4040         net->find_pseudo_cumack = 1;
4041         net->find_rtx_pseudo_cumack = 1;
4042         /* Choose an initial flowid. */
4043         net->flowid = stcb->asoc.my_vtag ^
4044             ntohs(stcb->rport) ^
4045             ntohs(stcb->sctp_ep->sctp_lport);
4046         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4047         if (netp) {
4048                 *netp = net;
4049         }
4050         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4051         if (net->ro.ro_nh == NULL) {
4052                 /* Since we have no route put it at the back */
4053                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4054         } else if (netfirst == NULL) {
4055                 /* We are the first one in the pool. */
4056                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4057         } else if (netfirst->ro.ro_nh == NULL) {
4058                 /*
4059                  * First one has NO route. Place this one ahead of the first
4060                  * one.
4061                  */
4062                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4063         } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4064                 /*
4065                  * This one has a different interface than the one at the
4066                  * top of the list. Place it ahead.
4067                  */
4068                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4069         } else {
4070                 /*
4071                  * Ok we have the same interface as the first one. Move
4072                  * forward until we find either a) one with a NULL route...
4073                  * insert ahead of that b) one with a different ifp.. insert
4074                  * after that. c) end of the list.. insert at the tail.
4075                  */
4076                 struct sctp_nets *netlook;
4077
4078                 do {
4079                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4080                         if (netlook == NULL) {
4081                                 /* End of the list */
4082                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4083                                 break;
4084                         } else if (netlook->ro.ro_nh == NULL) {
4085                                 /* next one has NO route */
4086                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4087                                 break;
4088                         } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4089                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4090                                     net, sctp_next);
4091                                 break;
4092                         }
4093                         /* Shift forward */
4094                         netfirst = netlook;
4095                 } while (netlook != NULL);
4096         }
4097
4098         /* got to have a primary set */
4099         if (stcb->asoc.primary_destination == 0) {
4100                 stcb->asoc.primary_destination = net;
4101         } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4102                     (net->ro.ro_nh) &&
4103             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4104                 /* No route to current primary adopt new primary */
4105                 stcb->asoc.primary_destination = net;
4106         }
4107         /* Validate primary is first */
4108         net = TAILQ_FIRST(&stcb->asoc.nets);
4109         if ((net != stcb->asoc.primary_destination) &&
4110             (stcb->asoc.primary_destination)) {
4111                 /*
4112                  * first one on the list is NOT the primary sctp_cmpaddr()
4113                  * is much more efficient if the primary is the first on the
4114                  * list, make it so.
4115                  */
4116                 TAILQ_REMOVE(&stcb->asoc.nets,
4117                     stcb->asoc.primary_destination, sctp_next);
4118                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4119                     stcb->asoc.primary_destination, sctp_next);
4120         }
4121         return (0);
4122 }
4123
4124
4125 static uint32_t
4126 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4127 {
4128         uint32_t id;
4129         struct sctpasochead *head;
4130         struct sctp_tcb *lstcb;
4131
4132 try_again:
4133         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4134                 /* TSNH */
4135                 return (0);
4136         }
4137         /*
4138          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4139          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4140          */
4141         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4142                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4143         }
4144         id = inp->sctp_associd_counter;
4145         inp->sctp_associd_counter++;
4146         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4147         if (lstcb) {
4148                 goto try_again;
4149         }
4150         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4151         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4152         stcb->asoc.in_asocid_hash = 1;
4153         return (id);
4154 }
4155
4156 /*
4157  * allocate an association and add it to the endpoint. The caller must be
4158  * careful to add all additional addresses once they are know right away or
4159  * else the assoc will be may experience a blackout scenario.
4160  */
4161 struct sctp_tcb *
4162 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4163     int *error, uint32_t override_tag, uint32_t vrf_id,
4164     uint16_t o_streams, uint16_t port,
4165     struct thread *p,
4166     int initialize_auth_params)
4167 {
4168         /* note the p argument is only valid in unbound sockets */
4169
4170         struct sctp_tcb *stcb;
4171         struct sctp_association *asoc;
4172         struct sctpasochead *head;
4173         uint16_t rport;
4174         int err;
4175
4176         /*
4177          * Assumption made here: Caller has done a
4178          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4179          * address does not exist already.
4180          */
4181         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4182                 /* Hit max assoc, sorry no more */
4183                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4184                 *error = ENOBUFS;
4185                 return (NULL);
4186         }
4187         if (firstaddr == NULL) {
4188                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4189                 *error = EINVAL;
4190                 return (NULL);
4191         }
4192         SCTP_INP_RLOCK(inp);
4193         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4194             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4195             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4196                 /*
4197                  * If its in the TCP pool, its NOT allowed to create an
4198                  * association. The parent listener needs to call
4199                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4200                  * off, or connected one does this.. its an error.
4201                  */
4202                 SCTP_INP_RUNLOCK(inp);
4203                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4204                 *error = EINVAL;
4205                 return (NULL);
4206         }
4207         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4208             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4209                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4210                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4211                         SCTP_INP_RUNLOCK(inp);
4212                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4213                         *error = EINVAL;
4214                         return (NULL);
4215                 }
4216         }
4217         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4218 #ifdef SCTP_DEBUG
4219         if (firstaddr) {
4220                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4221                 switch (firstaddr->sa_family) {
4222 #ifdef INET
4223                 case AF_INET:
4224                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4225                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4226                         break;
4227 #endif
4228 #ifdef INET6
4229                 case AF_INET6:
4230                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4231                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4232                         break;
4233 #endif
4234                 default:
4235                         break;
4236                 }
4237         } else {
4238                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4239         }
4240 #endif                          /* SCTP_DEBUG */
4241         switch (firstaddr->sa_family) {
4242 #ifdef INET
4243         case AF_INET:
4244                 {
4245                         struct sockaddr_in *sin;
4246
4247                         sin = (struct sockaddr_in *)firstaddr;
4248                         if ((ntohs(sin->sin_port) == 0) ||
4249                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4250                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4251                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4252                                 /* Invalid address */
4253                                 SCTP_INP_RUNLOCK(inp);
4254                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4255                                 *error = EINVAL;
4256                                 return (NULL);
4257                         }
4258                         rport = sin->sin_port;
4259                         break;
4260                 }
4261 #endif
4262 #ifdef INET6
4263         case AF_INET6:
4264                 {
4265                         struct sockaddr_in6 *sin6;
4266
4267                         sin6 = (struct sockaddr_in6 *)firstaddr;
4268                         if ((ntohs(sin6->sin6_port) == 0) ||
4269                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4270                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4271                                 /* Invalid address */
4272                                 SCTP_INP_RUNLOCK(inp);
4273                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4274                                 *error = EINVAL;
4275                                 return (NULL);
4276                         }
4277                         rport = sin6->sin6_port;
4278                         break;
4279                 }
4280 #endif
4281         default:
4282                 /* not supported family type */
4283                 SCTP_INP_RUNLOCK(inp);
4284                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4285                 *error = EINVAL;
4286                 return (NULL);
4287         }
4288         SCTP_INP_RUNLOCK(inp);
4289         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4290                 /*
4291                  * If you have not performed a bind, then we need to do the
4292                  * ephemeral bind for you.
4293                  */
4294                 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4295                         /* bind error, probably perm */
4296                         *error = err;
4297                         return (NULL);
4298                 }
4299         }
4300         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4301         if (stcb == NULL) {
4302                 /* out of memory? */
4303                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4304                 *error = ENOMEM;
4305                 return (NULL);
4306         }
4307         SCTP_INCR_ASOC_COUNT();
4308
4309         memset(stcb, 0, sizeof(*stcb));
4310         asoc = &stcb->asoc;
4311
4312         SCTP_TCB_LOCK_INIT(stcb);
4313         SCTP_TCB_SEND_LOCK_INIT(stcb);
4314         stcb->rport = rport;
4315         /* setup back pointer's */
4316         stcb->sctp_ep = inp;
4317         stcb->sctp_socket = inp->sctp_socket;
4318         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4319                 /* failed */
4320                 SCTP_TCB_LOCK_DESTROY(stcb);
4321                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4322                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4323                 SCTP_DECR_ASOC_COUNT();
4324                 *error = err;
4325                 return (NULL);
4326         }
4327         /* and the port */
4328         SCTP_INP_INFO_WLOCK();
4329         SCTP_INP_WLOCK(inp);
4330         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4331                 /* inpcb freed while alloc going on */
4332                 SCTP_TCB_LOCK_DESTROY(stcb);
4333                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4334                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4335                 SCTP_INP_WUNLOCK(inp);
4336                 SCTP_INP_INFO_WUNLOCK();
4337                 SCTP_DECR_ASOC_COUNT();
4338                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4339                 *error = EINVAL;
4340                 return (NULL);
4341         }
4342         SCTP_TCB_LOCK(stcb);
4343
4344         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4345         /* now that my_vtag is set, add it to the hash */
4346         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4347         /* put it in the bucket in the vtag hash of assoc's for the system */
4348         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4349         SCTP_INP_INFO_WUNLOCK();
4350
4351         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4352                 /* failure.. memory error? */
4353                 if (asoc->strmout) {
4354                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4355                         asoc->strmout = NULL;
4356                 }
4357                 if (asoc->mapping_array) {
4358                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4359                         asoc->mapping_array = NULL;
4360                 }
4361                 if (asoc->nr_mapping_array) {
4362                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4363                         asoc->nr_mapping_array = NULL;
4364                 }
4365                 SCTP_DECR_ASOC_COUNT();
4366                 SCTP_TCB_UNLOCK(stcb);
4367                 SCTP_TCB_LOCK_DESTROY(stcb);
4368                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4369                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4370                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4371                 SCTP_INP_WUNLOCK(inp);
4372                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4373                 *error = ENOBUFS;
4374                 return (NULL);
4375         }
4376         /* Init all the timers */
4377         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4378         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4379         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4380         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4381         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4382         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4383
4384         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4385         /* now file the port under the hash as well */
4386         if (inp->sctp_tcbhash != NULL) {
4387                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4388                     inp->sctp_hashmark)];
4389                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4390         }
4391         if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4392                 sctp_initialize_auth_params(inp, stcb);
4393         }
4394         SCTP_INP_WUNLOCK(inp);
4395         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4396         return (stcb);
4397 }
4398
4399
4400 void
4401 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4402 {
4403         struct sctp_inpcb *inp;
4404         struct sctp_association *asoc;
4405
4406         inp = stcb->sctp_ep;
4407         asoc = &stcb->asoc;
4408         asoc->numnets--;
4409         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4410         if (net == asoc->primary_destination) {
4411                 /* Reset primary */
4412                 struct sctp_nets *lnet;
4413
4414                 lnet = TAILQ_FIRST(&asoc->nets);
4415                 /*
4416                  * Mobility adaptation Ideally, if deleted destination is
4417                  * the primary, it becomes a fast retransmission trigger by
4418                  * the subsequent SET PRIMARY. (by micchie)
4419                  */
4420                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4421                     SCTP_MOBILITY_BASE) ||
4422                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4423                     SCTP_MOBILITY_FASTHANDOFF)) {
4424                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4425                         if (asoc->deleted_primary != NULL) {
4426                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4427                                 goto out;
4428                         }
4429                         asoc->deleted_primary = net;
4430                         atomic_add_int(&net->ref_count, 1);
4431                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4432                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4433                         sctp_mobility_feature_on(stcb->sctp_ep,
4434                             SCTP_MOBILITY_PRIM_DELETED);
4435                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4436                             stcb->sctp_ep, stcb, NULL);
4437                 }
4438 out:
4439                 /* Try to find a confirmed primary */
4440                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4441         }
4442         if (net == asoc->last_data_chunk_from) {
4443                 /* Reset primary */
4444                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4445         }
4446         if (net == asoc->last_control_chunk_from) {
4447                 /* Clear net */
4448                 asoc->last_control_chunk_from = NULL;
4449         }
4450         if (net == stcb->asoc.alternate) {
4451                 sctp_free_remote_addr(stcb->asoc.alternate);
4452                 stcb->asoc.alternate = NULL;
4453         }
4454         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4455             SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4456         sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4457             SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4458         net->dest_state |= SCTP_ADDR_BEING_DELETED;
4459         sctp_free_remote_addr(net);
4460 }
4461
4462 /*
4463  * remove a remote endpoint address from an association, it will fail if the
4464  * address does not exist.
4465  */
4466 int
4467 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4468 {
4469         /*
4470          * Here we need to remove a remote address. This is quite simple, we
4471          * first find it in the list of address for the association
4472          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4473          * on that item. Note we do not allow it to be removed if there are
4474          * no other addresses.
4475          */
4476         struct sctp_association *asoc;
4477         struct sctp_nets *net, *nnet;
4478
4479         asoc = &stcb->asoc;
4480
4481         /* locate the address */
4482         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4483                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4484                         continue;
4485                 }
4486                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4487                     remaddr)) {
4488                         /* we found the guy */
4489                         if (asoc->numnets < 2) {
4490                                 /* Must have at LEAST two remote addresses */
4491                                 return (-1);
4492                         } else {
4493                                 sctp_remove_net(stcb, net);
4494                                 return (0);
4495                         }
4496                 }
4497         }
4498         /* not found. */
4499         return (-2);
4500 }
4501
4502 void
4503 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4504 {
4505         struct sctpvtaghead *chain;
4506         struct sctp_tagblock *twait_block;
4507         int found = 0;
4508         int i;
4509
4510         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4511         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4512                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4513                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4514                             (twait_block->vtag_block[i].lport == lport) &&
4515                             (twait_block->vtag_block[i].rport == rport)) {
4516                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4517                                 twait_block->vtag_block[i].v_tag = 0;
4518                                 twait_block->vtag_block[i].lport = 0;
4519                                 twait_block->vtag_block[i].rport = 0;
4520                                 found = 1;
4521                                 break;
4522                         }
4523                 }
4524                 if (found)
4525                         break;
4526         }
4527 }
4528
4529 int
4530 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4531 {
4532         struct sctpvtaghead *chain;
4533         struct sctp_tagblock *twait_block;
4534         int found = 0;
4535         int i;
4536
4537         SCTP_INP_INFO_WLOCK();
4538         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4539         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4540                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4541                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4542                             (twait_block->vtag_block[i].lport == lport) &&
4543                             (twait_block->vtag_block[i].rport == rport)) {
4544                                 found = 1;
4545                                 break;
4546                         }
4547                 }
4548                 if (found)
4549                         break;
4550         }
4551         SCTP_INP_INFO_WUNLOCK();
4552         return (found);
4553 }
4554
4555
4556 void
4557 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4558 {
4559         struct sctpvtaghead *chain;
4560         struct sctp_tagblock *twait_block;
4561         struct timeval now;
4562         int set, i;
4563
4564         if (time == 0) {
4565                 /* Its disabled */
4566                 return;
4567         }
4568         (void)SCTP_GETTIME_TIMEVAL(&now);
4569         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4570         set = 0;
4571         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4572                 /* Block(s) present, lets find space, and expire on the fly */
4573                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4574                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4575                             !set) {
4576                                 twait_block->vtag_block[i].tv_sec_at_expire =
4577                                     now.tv_sec + time;
4578                                 twait_block->vtag_block[i].v_tag = tag;
4579                                 twait_block->vtag_block[i].lport = lport;
4580                                 twait_block->vtag_block[i].rport = rport;
4581                                 set = 1;
4582                         } else if ((twait_block->vtag_block[i].v_tag) &&
4583                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4584                                 /* Audit expires this guy */
4585                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4586                                 twait_block->vtag_block[i].v_tag = 0;
4587                                 twait_block->vtag_block[i].lport = 0;
4588                                 twait_block->vtag_block[i].rport = 0;
4589                                 if (set == 0) {
4590                                         /* Reuse it for my new tag */
4591                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4592                                         twait_block->vtag_block[i].v_tag = tag;
4593                                         twait_block->vtag_block[i].lport = lport;
4594                                         twait_block->vtag_block[i].rport = rport;
4595                                         set = 1;
4596                                 }
4597                         }
4598                 }
4599                 if (set) {
4600                         /*
4601                          * We only do up to the block where we can place our
4602                          * tag for audits
4603                          */
4604                         break;
4605                 }
4606         }
4607         /* Need to add a new block to chain */
4608         if (!set) {
4609                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4610                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4611                 if (twait_block == NULL) {
4612                         return;
4613                 }
4614                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4615                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4616                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4617                 twait_block->vtag_block[0].v_tag = tag;
4618                 twait_block->vtag_block[0].lport = lport;
4619                 twait_block->vtag_block[0].rport = rport;
4620         }
4621 }
4622
4623 void
4624 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4625 {
4626         struct sctp_tmit_chunk *chk, *nchk;
4627         struct sctp_queued_to_read *control, *ncontrol;
4628
4629         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4630                 TAILQ_REMOVE(rh, control, next_instrm);
4631                 control->on_strm_q = 0;
4632                 if (control->on_read_q == 0) {
4633                         sctp_free_remote_addr(control->whoFrom);
4634                         if (control->data) {
4635                                 sctp_m_freem(control->data);
4636                                 control->data = NULL;
4637                         }
4638                 }
4639                 /* Reassembly free? */
4640                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4641                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4642                         if (chk->data) {
4643                                 sctp_m_freem(chk->data);
4644                                 chk->data = NULL;
4645                         }
4646                         if (chk->holds_key_ref)
4647                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4648                         sctp_free_remote_addr(chk->whoTo);
4649                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4650                         SCTP_DECR_CHK_COUNT();
4651                         /* sa_ignore FREED_MEMORY */
4652                 }
4653                 /*
4654                  * We don't free the address here since all the net's were
4655                  * freed above.
4656                  */
4657                 if (control->on_read_q == 0) {
4658                         sctp_free_a_readq(stcb, control);
4659                 }
4660         }
4661 }
4662
4663 /*-
4664  * Free the association after un-hashing the remote port. This
4665  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4666  * expect that the input to this function IS a locked TCB.
4667  * It will return 0, if it did NOT destroy the association (instead
4668  * it unlocks it. It will return NON-zero if it either destroyed the
4669  * association OR the association is already destroyed.
4670  */
4671 int
4672 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4673 {
4674         int i;
4675         struct sctp_association *asoc;
4676         struct sctp_nets *net, *nnet;
4677         struct sctp_laddr *laddr, *naddr;
4678         struct sctp_tmit_chunk *chk, *nchk;
4679         struct sctp_asconf_addr *aparam, *naparam;
4680         struct sctp_asconf_ack *aack, *naack;
4681         struct sctp_stream_reset_list *strrst, *nstrrst;
4682         struct sctp_queued_to_read *sq, *nsq;
4683         struct sctp_stream_queue_pending *sp, *nsp;
4684         sctp_sharedkey_t *shared_key, *nshared_key;
4685         struct socket *so;
4686
4687         /* first, lets purge the entry from the hash table. */
4688
4689 #ifdef SCTP_LOG_CLOSING
4690         sctp_log_closing(inp, stcb, 6);
4691 #endif
4692         if (stcb->asoc.state == 0) {
4693 #ifdef SCTP_LOG_CLOSING
4694                 sctp_log_closing(inp, NULL, 7);
4695 #endif
4696                 /* there is no asoc, really TSNH :-0 */
4697                 return (1);
4698         }
4699         if (stcb->asoc.alternate) {
4700                 sctp_free_remote_addr(stcb->asoc.alternate);
4701                 stcb->asoc.alternate = NULL;
4702         }
4703         /* TEMP CODE */
4704         if (stcb->freed_from_where == 0) {
4705                 /* Only record the first place free happened from */
4706                 stcb->freed_from_where = from_location;
4707         }
4708         /* TEMP CODE */
4709
4710         asoc = &stcb->asoc;
4711         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4712             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4713                 /* nothing around */
4714                 so = NULL;
4715         else
4716                 so = inp->sctp_socket;
4717
4718         /*
4719          * We used timer based freeing if a reader or writer is in the way.
4720          * So we first check if we are actually being called from a timer,
4721          * if so we abort early if a reader or writer is still in the way.
4722          */
4723         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4724             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4725                 /*
4726                  * is it the timer driving us? if so are the reader/writers
4727                  * gone?
4728                  */
4729                 if (stcb->asoc.refcnt) {
4730                         /* nope, reader or writer in the way */
4731                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4732                         /* no asoc destroyed */
4733                         SCTP_TCB_UNLOCK(stcb);
4734 #ifdef SCTP_LOG_CLOSING
4735                         sctp_log_closing(inp, stcb, 8);
4736 #endif
4737                         return (0);
4738                 }
4739         }
4740         /* Now clean up any other timers */
4741         sctp_stop_association_timers(stcb, false);
4742         /* Now the read queue needs to be cleaned up (only once) */
4743         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4744                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4745                 SCTP_INP_READ_LOCK(inp);
4746                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4747                         if (sq->stcb == stcb) {
4748                                 sq->do_not_ref_stcb = 1;
4749                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4750                                 /*
4751                                  * If there is no end, there never will be
4752                                  * now.
4753                                  */
4754                                 if (sq->end_added == 0) {
4755                                         /* Held for PD-API clear that. */
4756                                         sq->pdapi_aborted = 1;
4757                                         sq->held_length = 0;
4758                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4759                                                 /*
4760                                                  * Need to add a PD-API
4761                                                  * aborted indication.
4762                                                  * Setting the control_pdapi
4763                                                  * assures that it will be
4764                                                  * added right after this
4765                                                  * msg.
4766                                                  */
4767                                                 uint32_t strseq;
4768
4769                                                 stcb->asoc.control_pdapi = sq;
4770                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4771                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4772                                                     stcb,
4773                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4774                                                     (void *)&strseq,
4775                                                     SCTP_SO_LOCKED);
4776                                                 stcb->asoc.control_pdapi = NULL;
4777                                         }
4778                                 }
4779                                 /* Add an end to wake them */
4780                                 sq->end_added = 1;
4781                         }
4782                 }
4783                 SCTP_INP_READ_UNLOCK(inp);
4784                 if (stcb->block_entry) {
4785                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4786                         stcb->block_entry->error = ECONNRESET;
4787                         stcb->block_entry = NULL;
4788                 }
4789         }
4790         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4791                 /*
4792                  * Someone holds a reference OR the socket is unaccepted
4793                  * yet.
4794                  */
4795                 if ((stcb->asoc.refcnt) ||
4796                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4797                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4798                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4799                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4800                 }
4801                 SCTP_TCB_UNLOCK(stcb);
4802                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4803                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4804                         /* nothing around */
4805                         so = NULL;
4806                 if (so) {
4807                         /* Wake any reader/writers */
4808                         sctp_sorwakeup(inp, so);
4809                         sctp_sowwakeup(inp, so);
4810                 }
4811
4812 #ifdef SCTP_LOG_CLOSING
4813                 sctp_log_closing(inp, stcb, 9);
4814 #endif
4815                 /* no asoc destroyed */
4816                 return (0);
4817         }
4818 #ifdef SCTP_LOG_CLOSING
4819         sctp_log_closing(inp, stcb, 10);
4820 #endif
4821         /*
4822          * When I reach here, no others want to kill the assoc yet.. and I
4823          * own the lock. Now its possible an abort comes in when I do the
4824          * lock exchange below to grab all the locks to do the final take
4825          * out. to prevent this we increment the count, which will start a
4826          * timer and blow out above thus assuring us that we hold exclusive
4827          * killing of the asoc. Note that after getting back the TCB lock we
4828          * will go ahead and increment the counter back up and stop any
4829          * timer a passing stranger may have started :-S
4830          */
4831         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4832                 atomic_add_int(&stcb->asoc.refcnt, 1);
4833
4834                 SCTP_TCB_UNLOCK(stcb);
4835                 SCTP_INP_INFO_WLOCK();
4836                 SCTP_INP_WLOCK(inp);
4837                 SCTP_TCB_LOCK(stcb);
4838         }
4839         /* Double check the GONE flag */
4840         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4841             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4842                 /* nothing around */
4843                 so = NULL;
4844
4845         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4846             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4847                 /*
4848                  * For TCP type we need special handling when we are
4849                  * connected. We also include the peel'ed off ones to.
4850                  */
4851                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4852                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4853                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4854                         if (so) {
4855                                 SOCKBUF_LOCK(&so->so_rcv);
4856                                 so->so_state &= ~(SS_ISCONNECTING |
4857                                     SS_ISDISCONNECTING |
4858                                     SS_ISCONFIRMING |
4859                                     SS_ISCONNECTED);
4860                                 so->so_state |= SS_ISDISCONNECTED;
4861                                 socantrcvmore_locked(so);
4862                                 socantsendmore(so);
4863                                 sctp_sowwakeup(inp, so);
4864                                 sctp_sorwakeup(inp, so);
4865                                 SCTP_SOWAKEUP(so);
4866                         }
4867                 }
4868         }
4869
4870         /*
4871          * Make it invalid too, that way if its about to run it will abort
4872          * and return.
4873          */
4874         /* re-increment the lock */
4875         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4876                 atomic_add_int(&stcb->asoc.refcnt, -1);
4877         }
4878         if (stcb->asoc.refcnt) {
4879                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4880                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4881                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4882                         SCTP_INP_INFO_WUNLOCK();
4883                         SCTP_INP_WUNLOCK(inp);
4884                 }
4885                 SCTP_TCB_UNLOCK(stcb);
4886                 return (0);
4887         }
4888         asoc->state = 0;
4889         if (inp->sctp_tcbhash) {
4890                 LIST_REMOVE(stcb, sctp_tcbhash);
4891         }
4892         if (stcb->asoc.in_asocid_hash) {
4893                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4894         }
4895         /* Now lets remove it from the list of ALL associations in the EP */
4896         LIST_REMOVE(stcb, sctp_tcblist);
4897         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4898                 SCTP_INP_INCR_REF(inp);
4899                 SCTP_INP_WUNLOCK(inp);
4900         }
4901         /* pull from vtag hash */
4902         LIST_REMOVE(stcb, sctp_asocs);
4903         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4904             inp->sctp_lport, stcb->rport);
4905
4906         /*
4907          * Now restop the timers to be sure this is paranoia at is finest!
4908          */
4909         sctp_stop_association_timers(stcb, true);
4910
4911         /*
4912          * The chunk lists and such SHOULD be empty but we check them just
4913          * in case.
4914          */
4915         /* anything on the wheel needs to be removed */
4916         SCTP_TCB_SEND_LOCK(stcb);
4917         for (i = 0; i < asoc->streamoutcnt; i++) {
4918                 struct sctp_stream_out *outs;
4919
4920                 outs = &asoc->strmout[i];
4921                 /* now clean up any chunks here */
4922                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4923                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4924                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4925                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4926                         sctp_free_spbufspace(stcb, asoc, sp);
4927                         if (sp->data) {
4928                                 if (so) {
4929                                         /* Still an open socket - report */
4930                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4931                                             0, (void *)sp, SCTP_SO_LOCKED);
4932                                 }
4933                                 if (sp->data) {
4934                                         sctp_m_freem(sp->data);
4935                                         sp->data = NULL;
4936                                         sp->tail_mbuf = NULL;
4937                                         sp->length = 0;
4938                                 }
4939                         }
4940                         if (sp->net) {
4941                                 sctp_free_remote_addr(sp->net);
4942                                 sp->net = NULL;
4943                         }
4944                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4945                 }
4946         }
4947         SCTP_TCB_SEND_UNLOCK(stcb);
4948         /* sa_ignore FREED_MEMORY */
4949         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4950                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4951                 SCTP_FREE(strrst, SCTP_M_STRESET);
4952         }
4953         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4954                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4955                 if (sq->data) {
4956                         sctp_m_freem(sq->data);
4957                         sq->data = NULL;
4958                 }
4959                 sctp_free_remote_addr(sq->whoFrom);
4960                 sq->whoFrom = NULL;
4961                 sq->stcb = NULL;
4962                 /* Free the ctl entry */
4963                 sctp_free_a_readq(stcb, sq);
4964                 /* sa_ignore FREED_MEMORY */
4965         }
4966         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4967                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4968                 if (chk->data) {
4969                         sctp_m_freem(chk->data);
4970                         chk->data = NULL;
4971                 }
4972                 if (chk->holds_key_ref)
4973                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4974                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4975                 SCTP_DECR_CHK_COUNT();
4976                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4977                 asoc->free_chunk_cnt--;
4978                 /* sa_ignore FREED_MEMORY */
4979         }
4980         /* pending send queue SHOULD be empty */
4981         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4982                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4983                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4984 #ifdef INVARIANTS
4985                 } else {
4986                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
4987 #endif
4988                 }
4989                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4990                 if (chk->data) {
4991                         if (so) {
4992                                 /* Still a socket? */
4993                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4994                                     0, chk, SCTP_SO_LOCKED);
4995                         }
4996                         if (chk->data) {
4997                                 sctp_m_freem(chk->data);
4998                                 chk->data = NULL;
4999                         }
5000                 }
5001                 if (chk->holds_key_ref)
5002                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5003                 if (chk->whoTo) {
5004                         sctp_free_remote_addr(chk->whoTo);
5005                         chk->whoTo = NULL;
5006                 }
5007                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5008                 SCTP_DECR_CHK_COUNT();
5009                 /* sa_ignore FREED_MEMORY */
5010         }
5011         /* sent queue SHOULD be empty */
5012         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5013                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5014                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5015                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5016 #ifdef INVARIANTS
5017                         } else {
5018                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5019 #endif
5020                         }
5021                 }
5022                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5023                 if (chk->data) {
5024                         if (so) {
5025                                 /* Still a socket? */
5026                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5027                                     0, chk, SCTP_SO_LOCKED);
5028                         }
5029                         if (chk->data) {
5030                                 sctp_m_freem(chk->data);
5031                                 chk->data = NULL;
5032                         }
5033                 }
5034                 if (chk->holds_key_ref)
5035                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5036                 sctp_free_remote_addr(chk->whoTo);
5037                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5038                 SCTP_DECR_CHK_COUNT();
5039                 /* sa_ignore FREED_MEMORY */
5040         }
5041 #ifdef INVARIANTS
5042         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5043                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5044                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5045                 }
5046         }
5047 #endif
5048         /* control queue MAY not be empty */
5049         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5050                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5051                 if (chk->data) {
5052                         sctp_m_freem(chk->data);
5053                         chk->data = NULL;
5054                 }
5055                 if (chk->holds_key_ref)
5056                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5057                 sctp_free_remote_addr(chk->whoTo);
5058                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5059                 SCTP_DECR_CHK_COUNT();
5060                 /* sa_ignore FREED_MEMORY */
5061         }
5062         /* ASCONF queue MAY not be empty */
5063         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5064                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5065                 if (chk->data) {
5066                         sctp_m_freem(chk->data);
5067                         chk->data = NULL;
5068                 }
5069                 if (chk->holds_key_ref)
5070                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5071                 sctp_free_remote_addr(chk->whoTo);
5072                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5073                 SCTP_DECR_CHK_COUNT();
5074                 /* sa_ignore FREED_MEMORY */
5075         }
5076         if (asoc->mapping_array) {
5077                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5078                 asoc->mapping_array = NULL;
5079         }
5080         if (asoc->nr_mapping_array) {
5081                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5082                 asoc->nr_mapping_array = NULL;
5083         }
5084         /* the stream outs */
5085         if (asoc->strmout) {
5086                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5087                 asoc->strmout = NULL;
5088         }
5089         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5090         if (asoc->strmin) {
5091                 for (i = 0; i < asoc->streamincnt; i++) {
5092                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5093                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5094                 }
5095                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5096                 asoc->strmin = NULL;
5097         }
5098         asoc->streamincnt = 0;
5099         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5100 #ifdef INVARIANTS
5101                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5102                         panic("no net's left alloc'ed, or list points to itself");
5103                 }
5104 #endif
5105                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5106                 sctp_free_remote_addr(net);
5107         }
5108         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5109                 /* sa_ignore FREED_MEMORY */
5110                 sctp_remove_laddr(laddr);
5111         }
5112
5113         /* pending asconf (address) parameters */
5114         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5115                 /* sa_ignore FREED_MEMORY */
5116                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5117                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5118         }
5119         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5120                 /* sa_ignore FREED_MEMORY */
5121                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5122                 if (aack->data != NULL) {
5123                         sctp_m_freem(aack->data);
5124                 }
5125                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5126         }
5127         /* clean up auth stuff */
5128         if (asoc->local_hmacs)
5129                 sctp_free_hmaclist(asoc->local_hmacs);
5130         if (asoc->peer_hmacs)
5131                 sctp_free_hmaclist(asoc->peer_hmacs);
5132
5133         if (asoc->local_auth_chunks)
5134                 sctp_free_chunklist(asoc->local_auth_chunks);
5135         if (asoc->peer_auth_chunks)
5136                 sctp_free_chunklist(asoc->peer_auth_chunks);
5137
5138         sctp_free_authinfo(&asoc->authinfo);
5139
5140         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5141                 LIST_REMOVE(shared_key, next);
5142                 sctp_free_sharedkey(shared_key);
5143                 /* sa_ignore FREED_MEMORY */
5144         }
5145
5146         /* Insert new items here :> */
5147
5148         /* Get rid of LOCK */
5149         SCTP_TCB_UNLOCK(stcb);
5150         SCTP_TCB_LOCK_DESTROY(stcb);
5151         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5152         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5153                 SCTP_INP_INFO_WUNLOCK();
5154                 SCTP_INP_RLOCK(inp);
5155         }
5156 #ifdef SCTP_TRACK_FREED_ASOCS
5157         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5158                 /* now clean up the tasoc itself */
5159                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5160                 SCTP_DECR_ASOC_COUNT();
5161         } else {
5162                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5163         }
5164 #else
5165         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5166         SCTP_DECR_ASOC_COUNT();
5167 #endif
5168         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5169                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5170                         /*
5171                          * If its NOT the inp_free calling us AND sctp_close
5172                          * as been called, we call back...
5173                          */
5174                         SCTP_INP_RUNLOCK(inp);
5175                         /*
5176                          * This will start the kill timer (if we are the
5177                          * last one) since we hold an increment yet. But
5178                          * this is the only safe way to do this since
5179                          * otherwise if the socket closes at the same time
5180                          * we are here we might collide in the cleanup.
5181                          */
5182                         sctp_inpcb_free(inp,
5183                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5184                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5185                         SCTP_INP_DECR_REF(inp);
5186                 } else {
5187                         /* The socket is still open. */
5188                         SCTP_INP_DECR_REF(inp);
5189                         SCTP_INP_RUNLOCK(inp);
5190                 }
5191         }
5192         /* destroyed the asoc */
5193 #ifdef SCTP_LOG_CLOSING
5194         sctp_log_closing(inp, NULL, 11);
5195 #endif
5196         return (1);
5197 }
5198
5199
5200
5201 /*
5202  * determine if a destination is "reachable" based upon the addresses bound
5203  * to the current endpoint (e.g. only v4 or v6 currently bound)
5204  */
5205 /*
5206  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5207  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5208  * types bound as its endpoint
5209  */
5210 int
5211 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5212 {
5213         struct sctp_inpcb *inp;
5214         int answer;
5215
5216         /*
5217          * No locks here, the TCB, in all cases is already locked and an
5218          * assoc is up. There is either a INP lock by the caller applied (in
5219          * asconf case when deleting an address) or NOT in the HB case,
5220          * however if HB then the INP increment is up and the INP will not
5221          * be removed (on top of the fact that we have a TCB lock). So we
5222          * only want to read the sctp_flags, which is either bound-all or
5223          * not.. no protection needed since once an assoc is up you can't be
5224          * changing your binding.
5225          */
5226         inp = stcb->sctp_ep;
5227         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5228                 /* if bound all, destination is not restricted */
5229                 /*
5230                  * RRS: Question during lock work: Is this correct? If you
5231                  * are bound-all you still might need to obey the V4--V6
5232                  * flags??? IMO this bound-all stuff needs to be removed!
5233                  */
5234                 return (1);
5235         }
5236         /* NOTE: all "scope" checks are done when local addresses are added */
5237         switch (destaddr->sa_family) {
5238 #ifdef INET6
5239         case AF_INET6:
5240                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5241                 break;
5242 #endif
5243 #ifdef INET
5244         case AF_INET:
5245                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5246                 break;
5247 #endif
5248         default:
5249                 /* invalid family, so it's unreachable */
5250                 answer = 0;
5251                 break;
5252         }
5253         return (answer);
5254 }
5255
5256 /*
5257  * update the inp_vflags on an endpoint
5258  */
5259 static void
5260 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5261 {
5262         struct sctp_laddr *laddr;
5263
5264         /* first clear the flag */
5265         inp->ip_inp.inp.inp_vflag = 0;
5266         /* set the flag based on addresses on the ep list */
5267         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5268                 if (laddr->ifa == NULL) {
5269                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5270                             __func__);
5271                         continue;
5272                 }
5273
5274                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5275                         continue;
5276                 }
5277                 switch (laddr->ifa->address.sa.sa_family) {
5278 #ifdef INET6
5279                 case AF_INET6:
5280                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5281                         break;
5282 #endif
5283 #ifdef INET
5284                 case AF_INET:
5285                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5286                         break;
5287 #endif
5288                 default:
5289                         break;
5290                 }
5291         }
5292 }
5293
5294 /*
5295  * Add the address to the endpoint local address list There is nothing to be
5296  * done if we are bound to all addresses
5297  */
5298 void
5299 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5300 {
5301         struct sctp_laddr *laddr;
5302         struct sctp_tcb *stcb;
5303         int fnd, error = 0;
5304
5305         fnd = 0;
5306
5307         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5308                 /* You are already bound to all. You have it already */
5309                 return;
5310         }
5311 #ifdef INET6
5312         if (ifa->address.sa.sa_family == AF_INET6) {
5313                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5314                         /* Can't bind a non-useable addr. */
5315                         return;
5316                 }
5317         }
5318 #endif
5319         /* first, is it already present? */
5320         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5321                 if (laddr->ifa == ifa) {
5322                         fnd = 1;
5323                         break;
5324                 }
5325         }
5326
5327         if (fnd == 0) {
5328                 /* Not in the ep list */
5329                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5330                 if (error != 0)
5331                         return;
5332                 inp->laddr_count++;
5333                 /* update inp_vflag flags */
5334                 switch (ifa->address.sa.sa_family) {
5335 #ifdef INET6
5336                 case AF_INET6:
5337                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5338                         break;
5339 #endif
5340 #ifdef INET
5341                 case AF_INET:
5342                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5343                         break;
5344 #endif
5345                 default:
5346                         break;
5347                 }
5348                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5349                         sctp_add_local_addr_restricted(stcb, ifa);
5350                 }
5351         }
5352         return;
5353 }
5354
5355
5356 /*
5357  * select a new (hopefully reachable) destination net (should only be used
5358  * when we deleted an ep addr that is the only usable source address to reach
5359  * the destination net)
5360  */
5361 static void
5362 sctp_select_primary_destination(struct sctp_tcb *stcb)
5363 {
5364         struct sctp_nets *net;
5365
5366         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5367                 /* for now, we'll just pick the first reachable one we find */
5368                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5369                         continue;
5370                 if (sctp_destination_is_reachable(stcb,
5371                     (struct sockaddr *)&net->ro._l_addr)) {
5372                         /* found a reachable destination */
5373                         stcb->asoc.primary_destination = net;
5374                 }
5375         }
5376         /* I can't there from here! ...we're gonna die shortly... */
5377 }
5378
5379
5380 /*
5381  * Delete the address from the endpoint local address list. There is nothing
5382  * to be done if we are bound to all addresses
5383  */
5384 void
5385 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5386 {
5387         struct sctp_laddr *laddr;
5388         int fnd;
5389
5390         fnd = 0;
5391         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5392                 /* You are already bound to all. You have it already */
5393                 return;
5394         }
5395         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5396                 if (laddr->ifa == ifa) {
5397                         fnd = 1;
5398                         break;
5399                 }
5400         }
5401         if (fnd && (inp->laddr_count < 2)) {
5402                 /* can't delete unless there are at LEAST 2 addresses */
5403                 return;
5404         }
5405         if (fnd) {
5406                 /*
5407                  * clean up any use of this address go through our
5408                  * associations and clear any last_used_address that match
5409                  * this one for each assoc, see if a new primary_destination
5410                  * is needed
5411                  */
5412                 struct sctp_tcb *stcb;
5413
5414                 /* clean up "next_addr_touse" */
5415                 if (inp->next_addr_touse == laddr)
5416                         /* delete this address */
5417                         inp->next_addr_touse = NULL;
5418
5419                 /* clean up "last_used_address" */
5420                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5421                         struct sctp_nets *net;
5422
5423                         SCTP_TCB_LOCK(stcb);
5424                         if (stcb->asoc.last_used_address == laddr)
5425                                 /* delete this address */
5426                                 stcb->asoc.last_used_address = NULL;
5427                         /*
5428                          * Now spin through all the nets and purge any ref
5429                          * to laddr
5430                          */
5431                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5432                                 if (net->ro._s_addr == laddr->ifa) {
5433                                         /* Yep, purge src address selected */
5434                                         RO_NHFREE(&net->ro);
5435                                         sctp_free_ifa(net->ro._s_addr);
5436                                         net->ro._s_addr = NULL;
5437                                         net->src_addr_selected = 0;
5438                                 }
5439                         }
5440                         SCTP_TCB_UNLOCK(stcb);
5441                 }               /* for each tcb */
5442                 /* remove it from the ep list */
5443                 sctp_remove_laddr(laddr);
5444                 inp->laddr_count--;
5445                 /* update inp_vflag flags */
5446                 sctp_update_ep_vflag(inp);
5447         }
5448         return;
5449 }
5450
5451 /*
5452  * Add the address to the TCB local address restricted list.
5453  * This is a "pending" address list (eg. addresses waiting for an
5454  * ASCONF-ACK response) and cannot be used as a valid source address.
5455  */
5456 void
5457 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5458 {
5459         struct sctp_laddr *laddr;
5460         struct sctpladdr *list;
5461
5462         /*
5463          * Assumes TCB is locked.. and possibly the INP. May need to
5464          * confirm/fix that if we need it and is not the case.
5465          */
5466         list = &stcb->asoc.sctp_restricted_addrs;
5467
5468 #ifdef INET6
5469         if (ifa->address.sa.sa_family == AF_INET6) {
5470                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5471                         /* Can't bind a non-existent addr. */
5472                         return;
5473                 }
5474         }
5475 #endif
5476         /* does the address already exist? */
5477         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5478                 if (laddr->ifa == ifa) {
5479                         return;
5480                 }
5481         }
5482
5483         /* add to the list */
5484         (void)sctp_insert_laddr(list, ifa, 0);
5485         return;
5486 }
5487
5488 /*
5489  * Remove a local address from the TCB local address restricted list
5490  */
5491 void
5492 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5493 {
5494         struct sctp_inpcb *inp;
5495         struct sctp_laddr *laddr;
5496
5497         /*
5498          * This is called by asconf work. It is assumed that a) The TCB is
5499          * locked and b) The INP is locked. This is true in as much as I can
5500          * trace through the entry asconf code where I did these locks.
5501          * Again, the ASCONF code is a bit different in that it does lock
5502          * the INP during its work often times. This must be since we don't
5503          * want other proc's looking up things while what they are looking
5504          * up is changing :-D
5505          */
5506
5507         inp = stcb->sctp_ep;
5508         /* if subset bound and don't allow ASCONF's, can't delete last */
5509         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5510             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5511                 if (stcb->sctp_ep->laddr_count < 2) {
5512                         /* can't delete last address */
5513                         return;
5514                 }
5515         }
5516         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5517                 /* remove the address if it exists */
5518                 if (laddr->ifa == NULL)
5519                         continue;
5520                 if (laddr->ifa == ifa) {
5521                         sctp_remove_laddr(laddr);
5522                         return;
5523                 }
5524         }
5525
5526         /* address not found! */
5527         return;
5528 }
5529
5530 /* sysctl */
5531 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5532 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5533
5534 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5535 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5536 int *sctp_cpuarry = NULL;
5537
5538 void
5539 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5540 {
5541         /* Queue a packet to a processor for the specified core */
5542         struct sctp_mcore_queue *qent;
5543         struct sctp_mcore_ctrl *wkq;
5544         int need_wake = 0;
5545
5546         if (sctp_mcore_workers == NULL) {
5547                 /* Something went way bad during setup */
5548                 sctp_input_with_port(m, off, 0);
5549                 return;
5550         }
5551         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5552             (sizeof(struct sctp_mcore_queue)),
5553             SCTP_M_MCORE);
5554         if (qent == NULL) {
5555                 /* This is trouble  */
5556                 sctp_input_with_port(m, off, 0);
5557                 return;
5558         }
5559         qent->vn = curvnet;
5560         qent->m = m;
5561         qent->off = off;
5562         qent->v6 = 0;
5563         wkq = &sctp_mcore_workers[cpu_to_use];
5564         SCTP_MCORE_QLOCK(wkq);
5565
5566         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5567         if (wkq->running == 0) {
5568                 need_wake = 1;
5569         }
5570         SCTP_MCORE_QUNLOCK(wkq);
5571         if (need_wake) {
5572                 wakeup(&wkq->running);
5573         }
5574 }
5575
5576 static void
5577 sctp_mcore_thread(void *arg)
5578 {
5579
5580         struct sctp_mcore_ctrl *wkq;
5581         struct sctp_mcore_queue *qent;
5582
5583         wkq = (struct sctp_mcore_ctrl *)arg;
5584         struct mbuf *m;
5585         int off, v6;
5586
5587         /* Wait for first tickle */
5588         SCTP_MCORE_LOCK(wkq);
5589         wkq->running = 0;
5590         msleep(&wkq->running,
5591             &wkq->core_mtx,
5592             0, "wait for pkt", 0);
5593         SCTP_MCORE_UNLOCK(wkq);
5594
5595         /* Bind to our cpu */
5596         thread_lock(curthread);
5597         sched_bind(curthread, wkq->cpuid);
5598         thread_unlock(curthread);
5599
5600         /* Now lets start working */
5601         SCTP_MCORE_LOCK(wkq);
5602         /* Now grab lock and go */
5603         for (;;) {
5604                 SCTP_MCORE_QLOCK(wkq);
5605 skip_sleep:
5606                 wkq->running = 1;
5607                 qent = TAILQ_FIRST(&wkq->que);
5608                 if (qent) {
5609                         TAILQ_REMOVE(&wkq->que, qent, next);
5610                         SCTP_MCORE_QUNLOCK(wkq);
5611                         CURVNET_SET(qent->vn);
5612                         m = qent->m;
5613                         off = qent->off;
5614                         v6 = qent->v6;
5615                         SCTP_FREE(qent, SCTP_M_MCORE);
5616                         if (v6 == 0) {
5617                                 sctp_input_with_port(m, off, 0);
5618                         } else {
5619                                 SCTP_PRINTF("V6 not yet supported\n");
5620                                 sctp_m_freem(m);
5621                         }
5622                         CURVNET_RESTORE();
5623                         SCTP_MCORE_QLOCK(wkq);
5624                 }
5625                 wkq->running = 0;
5626                 if (!TAILQ_EMPTY(&wkq->que)) {
5627                         goto skip_sleep;
5628                 }
5629                 SCTP_MCORE_QUNLOCK(wkq);
5630                 msleep(&wkq->running,
5631                     &wkq->core_mtx,
5632                     0, "wait for pkt", 0);
5633         }
5634 }
5635
5636 static void
5637 sctp_startup_mcore_threads(void)
5638 {
5639         int i, cpu;
5640
5641         if (mp_ncpus == 1)
5642                 return;
5643
5644         if (sctp_mcore_workers != NULL) {
5645                 /*
5646                  * Already been here in some previous vnet?
5647                  */
5648                 return;
5649         }
5650         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5651             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5652             SCTP_M_MCORE);
5653         if (sctp_mcore_workers == NULL) {
5654                 /* TSNH I hope */
5655                 return;
5656         }
5657         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5658             sizeof(struct sctp_mcore_ctrl)));
5659         /* Init the structures */
5660         for (i = 0; i <= mp_maxid; i++) {
5661                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5662                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5663                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5664                 sctp_mcore_workers[i].cpuid = i;
5665         }
5666         if (sctp_cpuarry == NULL) {
5667                 SCTP_MALLOC(sctp_cpuarry, int *,
5668                     (mp_ncpus * sizeof(int)),
5669                     SCTP_M_MCORE);
5670                 i = 0;
5671                 CPU_FOREACH(cpu) {
5672                         sctp_cpuarry[i] = cpu;
5673                         i++;
5674                 }
5675         }
5676         /* Now start them all */
5677         CPU_FOREACH(cpu) {
5678                 (void)kproc_create(sctp_mcore_thread,
5679                     (void *)&sctp_mcore_workers[cpu],
5680                     &sctp_mcore_workers[cpu].thread_proc,
5681                     RFPROC,
5682                     SCTP_KTHREAD_PAGES,
5683                     SCTP_MCORE_NAME);
5684         }
5685 }
5686 #endif
5687
5688 void
5689 sctp_pcb_init(void)
5690 {
5691         /*
5692          * SCTP initialization for the PCB structures should be called by
5693          * the sctp_init() function.
5694          */
5695         int i;
5696         struct timeval tv;
5697
5698         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5699                 /* error I was called twice */
5700                 return;
5701         }
5702         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5703
5704 #if defined(SCTP_LOCAL_TRACE_BUF)
5705         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5706 #endif
5707 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5708         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5709             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5710             SCTP_M_MCORE);
5711 #endif
5712         (void)SCTP_GETTIME_TIMEVAL(&tv);
5713 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5714         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5715         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5716         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5717 #else
5718         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5719         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5720         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5721 #endif
5722         /* init the empty list of (All) Endpoints */
5723         LIST_INIT(&SCTP_BASE_INFO(listhead));
5724
5725
5726         /* init the hash table of endpoints */
5727         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5728         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5729         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5730         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5731             &SCTP_BASE_INFO(hashasocmark));
5732         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5733             &SCTP_BASE_INFO(hashmark));
5734         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5735             &SCTP_BASE_INFO(hashtcpmark));
5736         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5737
5738
5739         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5740             &SCTP_BASE_INFO(hashvrfmark));
5741
5742         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5743             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5744         /* init the zones */
5745         /*
5746          * FIX ME: Should check for NULL returns, but if it does fail we are
5747          * doomed to panic anyways... add later maybe.
5748          */
5749         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5750             sizeof(struct sctp_inpcb), maxsockets);
5751
5752         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5753             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5754
5755         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5756             sizeof(struct sctp_laddr),
5757             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5758
5759         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5760             sizeof(struct sctp_nets),
5761             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5762
5763         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5764             sizeof(struct sctp_tmit_chunk),
5765             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5766
5767         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5768             sizeof(struct sctp_queued_to_read),
5769             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5770
5771         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5772             sizeof(struct sctp_stream_queue_pending),
5773             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5774
5775         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5776             sizeof(struct sctp_asconf),
5777             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5778
5779         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5780             sizeof(struct sctp_asconf_ack),
5781             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5782
5783
5784         /* Master Lock INIT for info structure */
5785         SCTP_INP_INFO_LOCK_INIT();
5786         SCTP_STATLOG_INIT_LOCK();
5787
5788         SCTP_IPI_COUNT_INIT();
5789         SCTP_IPI_ADDR_INIT();
5790 #ifdef SCTP_PACKET_LOGGING
5791         SCTP_IP_PKTLOG_INIT();
5792 #endif
5793         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5794
5795         SCTP_WQ_ADDR_INIT();
5796         /* not sure if we need all the counts */
5797         SCTP_BASE_INFO(ipi_count_ep) = 0;
5798         /* assoc/tcb zone info */
5799         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5800         /* local addrlist zone info */
5801         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5802         /* remote addrlist zone info */
5803         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5804         /* chunk info */
5805         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5806
5807         /* socket queue zone info */
5808         SCTP_BASE_INFO(ipi_count_readq) = 0;
5809
5810         /* stream out queue cont */
5811         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5812
5813         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5814         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5815
5816         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5817
5818         /* Init the TIMEWAIT list */
5819         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5820                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5821         }
5822         sctp_startup_iterator();
5823
5824 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5825         sctp_startup_mcore_threads();
5826 #endif
5827
5828         /*
5829          * INIT the default VRF which for BSD is the only one, other O/S's
5830          * may have more. But initially they must start with one and then
5831          * add the VRF's as addresses are added.
5832          */
5833         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5834 }
5835
5836 /*
5837  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5838  */
5839 void
5840 sctp_pcb_finish(void)
5841 {
5842         struct sctp_vrflist *vrf_bucket;
5843         struct sctp_vrf *vrf, *nvrf;
5844         struct sctp_ifn *ifn, *nifn;
5845         struct sctp_ifa *ifa, *nifa;
5846         struct sctpvtaghead *chain;
5847         struct sctp_tagblock *twait_block, *prev_twait_block;
5848         struct sctp_laddr *wi, *nwi;
5849         int i;
5850         struct sctp_iterator *it, *nit;
5851
5852         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5853                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5854                 return;
5855         }
5856         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5857         /*
5858          * In FreeBSD the iterator thread never exits but we do clean up.
5859          * The only way FreeBSD reaches here is if we have VRF's but we
5860          * still add the ifdef to make it compile on old versions.
5861          */
5862 retry:
5863         SCTP_IPI_ITERATOR_WQ_LOCK();
5864         /*
5865          * sctp_iterator_worker() might be working on an it entry without
5866          * holding the lock.  We won't find it on the list either and
5867          * continue and free/destroy it.  While holding the lock, spin, to
5868          * avoid the race condition as sctp_iterator_worker() will have to
5869          * wait to re-acquire the lock.
5870          */
5871         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5872                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5873                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5874                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5875                 DELAY(10);
5876                 goto retry;
5877         }
5878         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5879                 if (it->vn != curvnet) {
5880                         continue;
5881                 }
5882                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5883                 if (it->function_atend != NULL) {
5884                         (*it->function_atend) (it->pointer, it->val);
5885                 }
5886                 SCTP_FREE(it, SCTP_M_ITER);
5887         }
5888         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5889         SCTP_ITERATOR_LOCK();
5890         if ((sctp_it_ctl.cur_it) &&
5891             (sctp_it_ctl.cur_it->vn == curvnet)) {
5892                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5893         }
5894         SCTP_ITERATOR_UNLOCK();
5895         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5896         SCTP_WQ_ADDR_LOCK();
5897         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5898                 LIST_REMOVE(wi, sctp_nxt_addr);
5899                 SCTP_DECR_LADDR_COUNT();
5900                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5901                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5902                 }
5903                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5904         }
5905         SCTP_WQ_ADDR_UNLOCK();
5906
5907         /*
5908          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5909          * destroyed first).
5910          */
5911         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5912         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5913                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5914                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5915                                 /* free the ifa */
5916                                 LIST_REMOVE(ifa, next_bucket);
5917                                 LIST_REMOVE(ifa, next_ifa);
5918                                 SCTP_FREE(ifa, SCTP_M_IFA);
5919                         }
5920                         /* free the ifn */
5921                         LIST_REMOVE(ifn, next_bucket);
5922                         LIST_REMOVE(ifn, next_ifn);
5923                         SCTP_FREE(ifn, SCTP_M_IFN);
5924                 }
5925                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5926                 /* free the vrf */
5927                 LIST_REMOVE(vrf, next_vrf);
5928                 SCTP_FREE(vrf, SCTP_M_VRF);
5929         }
5930         /* free the vrf hashes */
5931         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5932         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5933
5934         /*
5935          * free the TIMEWAIT list elements malloc'd in the function
5936          * sctp_add_vtag_to_timewait()...
5937          */
5938         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5939                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5940                 if (!LIST_EMPTY(chain)) {
5941                         prev_twait_block = NULL;
5942                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5943                                 if (prev_twait_block) {
5944                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5945                                 }
5946                                 prev_twait_block = twait_block;
5947                         }
5948                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5949                 }
5950         }
5951
5952         /* free the locks and mutexes */
5953 #ifdef SCTP_PACKET_LOGGING
5954         SCTP_IP_PKTLOG_DESTROY();
5955 #endif
5956         SCTP_IPI_ADDR_DESTROY();
5957         SCTP_STATLOG_DESTROY();
5958         SCTP_INP_INFO_LOCK_DESTROY();
5959
5960         SCTP_WQ_ADDR_DESTROY();
5961
5962         /* Get rid of other stuff too. */
5963         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5964                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5965         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5966                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5967         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5968                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5969
5970         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5971         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5972         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5973         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5974         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5975         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5976         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5977         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5978         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5979 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5980         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5981 #endif
5982 }
5983
5984
5985 int
5986 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5987     int offset, int limit,
5988     struct sockaddr *src, struct sockaddr *dst,
5989     struct sockaddr *altsa, uint16_t port)
5990 {
5991         /*
5992          * grub through the INIT pulling addresses and loading them to the
5993          * nets structure in the asoc. The from address in the mbuf should
5994          * also be loaded (if it is not already). This routine can be called
5995          * with either INIT or INIT-ACK's as long as the m points to the IP
5996          * packet and the offset points to the beginning of the parameters.
5997          */
5998         struct sctp_inpcb *inp;
5999         struct sctp_nets *net, *nnet, *net_tmp;
6000         struct sctp_paramhdr *phdr, param_buf;
6001         struct sctp_tcb *stcb_tmp;
6002         uint16_t ptype, plen;
6003         struct sockaddr *sa;
6004         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6005         struct sctp_auth_random *p_random = NULL;
6006         uint16_t random_len = 0;
6007         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6008         struct sctp_auth_hmac_algo *hmacs = NULL;
6009         uint16_t hmacs_len = 0;
6010         uint8_t saw_asconf = 0;
6011         uint8_t saw_asconf_ack = 0;
6012         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6013         struct sctp_auth_chunk_list *chunks = NULL;
6014         uint16_t num_chunks = 0;
6015         sctp_key_t *new_key;
6016         uint32_t keylen;
6017         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6018         uint8_t peer_supports_ecn;
6019         uint8_t peer_supports_prsctp;
6020         uint8_t peer_supports_auth;
6021         uint8_t peer_supports_asconf;
6022         uint8_t peer_supports_asconf_ack;
6023         uint8_t peer_supports_reconfig;
6024         uint8_t peer_supports_nrsack;
6025         uint8_t peer_supports_pktdrop;
6026         uint8_t peer_supports_idata;
6027 #ifdef INET
6028         struct sockaddr_in sin;
6029 #endif
6030 #ifdef INET6
6031         struct sockaddr_in6 sin6;
6032 #endif
6033
6034         /* First get the destination address setup too. */
6035 #ifdef INET
6036         memset(&sin, 0, sizeof(sin));
6037         sin.sin_family = AF_INET;
6038         sin.sin_len = sizeof(sin);
6039         sin.sin_port = stcb->rport;
6040 #endif
6041 #ifdef INET6
6042         memset(&sin6, 0, sizeof(sin6));
6043         sin6.sin6_family = AF_INET6;
6044         sin6.sin6_len = sizeof(struct sockaddr_in6);
6045         sin6.sin6_port = stcb->rport;
6046 #endif
6047         if (altsa) {
6048                 sa = altsa;
6049         } else {
6050                 sa = src;
6051         }
6052         peer_supports_idata = 0;
6053         peer_supports_ecn = 0;
6054         peer_supports_prsctp = 0;
6055         peer_supports_auth = 0;
6056         peer_supports_asconf = 0;
6057         peer_supports_reconfig = 0;
6058         peer_supports_nrsack = 0;
6059         peer_supports_pktdrop = 0;
6060         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6061                 /* mark all addresses that we have currently on the list */
6062                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6063         }
6064         /* does the source address already exist? if so skip it */
6065         inp = stcb->sctp_ep;
6066         atomic_add_int(&stcb->asoc.refcnt, 1);
6067         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6068         atomic_add_int(&stcb->asoc.refcnt, -1);
6069
6070         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6071                 /* we must add the source address */
6072                 /* no scope set here since we have a tcb already. */
6073                 switch (sa->sa_family) {
6074 #ifdef INET
6075                 case AF_INET:
6076                         if (stcb->asoc.scope.ipv4_addr_legal) {
6077                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6078                                         return (-1);
6079                                 }
6080                         }
6081                         break;
6082 #endif
6083 #ifdef INET6
6084                 case AF_INET6:
6085                         if (stcb->asoc.scope.ipv6_addr_legal) {
6086                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6087                                         return (-2);
6088                                 }
6089                         }
6090                         break;
6091 #endif
6092                 default:
6093                         break;
6094                 }
6095         } else {
6096                 if (net_tmp != NULL && stcb_tmp == stcb) {
6097                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6098                 } else if (stcb_tmp != stcb) {
6099                         /* It belongs to another association? */
6100                         if (stcb_tmp)
6101                                 SCTP_TCB_UNLOCK(stcb_tmp);
6102                         return (-3);
6103                 }
6104         }
6105         if (stcb->asoc.state == 0) {
6106                 /* the assoc was freed? */
6107                 return (-4);
6108         }
6109         /* now we must go through each of the params. */
6110         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6111         while (phdr) {
6112                 ptype = ntohs(phdr->param_type);
6113                 plen = ntohs(phdr->param_length);
6114                 /*
6115                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6116                  * (uint32_t)ptype, (int)plen);
6117                  */
6118                 if (offset + plen > limit) {
6119                         break;
6120                 }
6121                 if (plen < sizeof(struct sctp_paramhdr)) {
6122                         break;
6123                 }
6124 #ifdef INET
6125                 if (ptype == SCTP_IPV4_ADDRESS) {
6126                         if (stcb->asoc.scope.ipv4_addr_legal) {
6127                                 struct sctp_ipv4addr_param *p4, p4_buf;
6128
6129                                 /* ok get the v4 address and check/add */
6130                                 phdr = sctp_get_next_param(m, offset,
6131                                     (struct sctp_paramhdr *)&p4_buf,
6132                                     sizeof(p4_buf));
6133                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6134                                     phdr == NULL) {
6135                                         return (-5);
6136                                 }
6137                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6138                                 sin.sin_addr.s_addr = p4->addr;
6139                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6140                                         /* Skip multi-cast addresses */
6141                                         goto next_param;
6142                                 }
6143                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6144                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6145                                         goto next_param;
6146                                 }
6147                                 sa = (struct sockaddr *)&sin;
6148                                 inp = stcb->sctp_ep;
6149                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6150                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6151                                     dst, stcb);
6152                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6153
6154                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6155                                     inp == NULL) {
6156                                         /* we must add the source address */
6157                                         /*
6158                                          * no scope set since we have a tcb
6159                                          * already
6160                                          */
6161
6162                                         /*
6163                                          * we must validate the state again
6164                                          * here
6165                                          */
6166                         add_it_now:
6167                                         if (stcb->asoc.state == 0) {
6168                                                 /* the assoc was freed? */
6169                                                 return (-7);
6170                                         }
6171                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6172                                                 return (-8);
6173                                         }
6174                                 } else if (stcb_tmp == stcb) {
6175                                         if (stcb->asoc.state == 0) {
6176                                                 /* the assoc was freed? */
6177                                                 return (-10);
6178                                         }
6179                                         if (net != NULL) {
6180                                                 /* clear flag */
6181                                                 net->dest_state &=
6182                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6183                                         }
6184                                 } else {
6185                                         /*
6186                                          * strange, address is in another
6187                                          * assoc? straighten out locks.
6188                                          */
6189                                         if (stcb_tmp) {
6190                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6191                                                         struct mbuf *op_err;
6192                                                         char msg[SCTP_DIAG_INFO_LEN];
6193
6194                                                         /*
6195                                                          * in setup state we
6196                                                          * abort this guy
6197                                                          */
6198                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6199                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6200                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6201                                                             msg);
6202                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6203                                                             stcb_tmp, op_err,
6204                                                             SCTP_SO_NOT_LOCKED);
6205                                                         goto add_it_now;
6206                                                 }
6207                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6208                                         }
6209
6210                                         if (stcb->asoc.state == 0) {
6211                                                 /* the assoc was freed? */
6212                                                 return (-12);
6213                                         }
6214                                         return (-13);
6215                                 }
6216                         }
6217                 } else
6218 #endif
6219 #ifdef INET6
6220                 if (ptype == SCTP_IPV6_ADDRESS) {
6221                         if (stcb->asoc.scope.ipv6_addr_legal) {
6222                                 /* ok get the v6 address and check/add */
6223                                 struct sctp_ipv6addr_param *p6, p6_buf;
6224
6225                                 phdr = sctp_get_next_param(m, offset,
6226                                     (struct sctp_paramhdr *)&p6_buf,
6227                                     sizeof(p6_buf));
6228                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6229                                     phdr == NULL) {
6230                                         return (-14);
6231                                 }
6232                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6233                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6234                                     sizeof(p6->addr));
6235                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6236                                         /* Skip multi-cast addresses */
6237                                         goto next_param;
6238                                 }
6239                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6240                                         /*
6241                                          * Link local make no sense without
6242                                          * scope
6243                                          */
6244                                         goto next_param;
6245                                 }
6246                                 sa = (struct sockaddr *)&sin6;
6247                                 inp = stcb->sctp_ep;
6248                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6249                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6250                                     dst, stcb);
6251                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6252                                 if (stcb_tmp == NULL &&
6253                                     (inp == stcb->sctp_ep || inp == NULL)) {
6254                                         /*
6255                                          * we must validate the state again
6256                                          * here
6257                                          */
6258                         add_it_now6:
6259                                         if (stcb->asoc.state == 0) {
6260                                                 /* the assoc was freed? */
6261                                                 return (-16);
6262                                         }
6263                                         /*
6264                                          * we must add the address, no scope
6265                                          * set
6266                                          */
6267                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6268                                                 return (-17);
6269                                         }
6270                                 } else if (stcb_tmp == stcb) {
6271                                         /*
6272                                          * we must validate the state again
6273                                          * here
6274                                          */
6275                                         if (stcb->asoc.state == 0) {
6276                                                 /* the assoc was freed? */
6277                                                 return (-19);
6278                                         }
6279                                         if (net != NULL) {
6280                                                 /* clear flag */
6281                                                 net->dest_state &=
6282                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6283                                         }
6284                                 } else {
6285                                         /*
6286                                          * strange, address is in another
6287                                          * assoc? straighten out locks.
6288                                          */
6289                                         if (stcb_tmp) {
6290                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6291                                                         struct mbuf *op_err;
6292                                                         char msg[SCTP_DIAG_INFO_LEN];
6293
6294                                                         /*
6295                                                          * in setup state we
6296                                                          * abort this guy
6297                                                          */
6298                                                         SCTP_SNPRINTF(msg, sizeof(msg),
6299                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6300                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6301                                                             msg);
6302                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6303                                                             stcb_tmp, op_err,
6304                                                             SCTP_SO_NOT_LOCKED);
6305                                                         goto add_it_now6;
6306                                                 }
6307                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6308                                         }
6309                                         if (stcb->asoc.state == 0) {
6310                                                 /* the assoc was freed? */
6311                                                 return (-21);
6312                                         }
6313                                         return (-22);
6314                                 }
6315                         }
6316                 } else
6317 #endif
6318                 if (ptype == SCTP_ECN_CAPABLE) {
6319                         peer_supports_ecn = 1;
6320                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6321                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6322                                 struct sctp_adaptation_layer_indication ai,
6323                                                                 *aip;
6324
6325                                 phdr = sctp_get_next_param(m, offset,
6326                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6327                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6328                                 if (aip) {
6329                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6330                                         stcb->asoc.adaptation_needed = 1;
6331                                 }
6332                         }
6333                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6334                         struct sctp_asconf_addr_param lstore, *fee;
6335                         int lptype;
6336                         struct sockaddr *lsa = NULL;
6337 #ifdef INET
6338                         struct sctp_asconf_addrv4_param *fii;
6339 #endif
6340
6341                         if (stcb->asoc.asconf_supported == 0) {
6342                                 return (-100);
6343                         }
6344                         if (plen > sizeof(lstore)) {
6345                                 return (-23);
6346                         }
6347                         if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6348                                 return (-101);
6349                         }
6350                         phdr = sctp_get_next_param(m, offset,
6351                             (struct sctp_paramhdr *)&lstore,
6352                             plen);
6353                         if (phdr == NULL) {
6354                                 return (-24);
6355                         }
6356                         fee = (struct sctp_asconf_addr_param *)phdr;
6357                         lptype = ntohs(fee->addrp.ph.param_type);
6358                         switch (lptype) {
6359 #ifdef INET
6360                         case SCTP_IPV4_ADDRESS:
6361                                 if (plen !=
6362                                     sizeof(struct sctp_asconf_addrv4_param)) {
6363                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6364                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6365                                             plen);
6366                                 } else {
6367                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6368                                         sin.sin_addr.s_addr = fii->addrp.addr;
6369                                         lsa = (struct sockaddr *)&sin;
6370                                 }
6371                                 break;
6372 #endif
6373 #ifdef INET6
6374                         case SCTP_IPV6_ADDRESS:
6375                                 if (plen !=
6376                                     sizeof(struct sctp_asconf_addr_param)) {
6377                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6378                                             (int)sizeof(struct sctp_asconf_addr_param),
6379                                             plen);
6380                                 } else {
6381                                         memcpy(sin6.sin6_addr.s6_addr,
6382                                             fee->addrp.addr,
6383                                             sizeof(fee->addrp.addr));
6384                                         lsa = (struct sockaddr *)&sin6;
6385                                 }
6386                                 break;
6387 #endif
6388                         default:
6389                                 break;
6390                         }
6391                         if (lsa) {
6392                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6393                         }
6394                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6395                         stcb->asoc.peer_supports_nat = 1;
6396                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6397                         /* Peer supports pr-sctp */
6398                         peer_supports_prsctp = 1;
6399                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6400                         /* A supported extension chunk */
6401                         struct sctp_supported_chunk_types_param *pr_supported;
6402                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6403                         int num_ent, i;
6404
6405                         if (plen > sizeof(local_store)) {
6406                                 return (-35);
6407                         }
6408                         phdr = sctp_get_next_param(m, offset,
6409                             (struct sctp_paramhdr *)&local_store, plen);
6410                         if (phdr == NULL) {
6411                                 return (-25);
6412                         }
6413                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6414                         num_ent = plen - sizeof(struct sctp_paramhdr);
6415                         for (i = 0; i < num_ent; i++) {
6416                                 switch (pr_supported->chunk_types[i]) {
6417                                 case SCTP_ASCONF:
6418                                         peer_supports_asconf = 1;
6419                                         break;
6420                                 case SCTP_ASCONF_ACK:
6421                                         peer_supports_asconf_ack = 1;
6422                                         break;
6423                                 case SCTP_FORWARD_CUM_TSN:
6424                                         peer_supports_prsctp = 1;
6425                                         break;
6426                                 case SCTP_PACKET_DROPPED:
6427                                         peer_supports_pktdrop = 1;
6428                                         break;
6429                                 case SCTP_NR_SELECTIVE_ACK:
6430                                         peer_supports_nrsack = 1;
6431                                         break;
6432                                 case SCTP_STREAM_RESET:
6433                                         peer_supports_reconfig = 1;
6434                                         break;
6435                                 case SCTP_AUTHENTICATION:
6436                                         peer_supports_auth = 1;
6437                                         break;
6438                                 case SCTP_IDATA:
6439                                         peer_supports_idata = 1;
6440                                         break;
6441                                 default:
6442                                         /* one I have not learned yet */
6443                                         break;
6444
6445                                 }
6446                         }
6447                 } else if (ptype == SCTP_RANDOM) {
6448                         if (plen > sizeof(random_store))
6449                                 break;
6450                         if (got_random) {
6451                                 /* already processed a RANDOM */
6452                                 goto next_param;
6453                         }
6454                         phdr = sctp_get_next_param(m, offset,
6455                             (struct sctp_paramhdr *)random_store,
6456                             plen);
6457                         if (phdr == NULL)
6458                                 return (-26);
6459                         p_random = (struct sctp_auth_random *)phdr;
6460                         random_len = plen - sizeof(*p_random);
6461                         /* enforce the random length */
6462                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6463                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6464                                 return (-27);
6465                         }
6466                         got_random = 1;
6467                 } else if (ptype == SCTP_HMAC_LIST) {
6468                         uint16_t num_hmacs;
6469                         uint16_t i;
6470
6471                         if (plen > sizeof(hmacs_store))
6472                                 break;
6473                         if (got_hmacs) {
6474                                 /* already processed a HMAC list */
6475                                 goto next_param;
6476                         }
6477                         phdr = sctp_get_next_param(m, offset,
6478                             (struct sctp_paramhdr *)hmacs_store,
6479                             plen);
6480                         if (phdr == NULL)
6481                                 return (-28);
6482                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6483                         hmacs_len = plen - sizeof(*hmacs);
6484                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6485                         /* validate the hmac list */
6486                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6487                                 return (-29);
6488                         }
6489                         if (stcb->asoc.peer_hmacs != NULL)
6490                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6491                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6492                         if (stcb->asoc.peer_hmacs != NULL) {
6493                                 for (i = 0; i < num_hmacs; i++) {
6494                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6495                                             ntohs(hmacs->hmac_ids[i]));
6496                                 }
6497                         }
6498                         got_hmacs = 1;
6499                 } else if (ptype == SCTP_CHUNK_LIST) {
6500                         int i;
6501
6502                         if (plen > sizeof(chunks_store))
6503                                 break;
6504                         if (got_chklist) {
6505                                 /* already processed a Chunks list */
6506                                 goto next_param;
6507                         }
6508                         phdr = sctp_get_next_param(m, offset,
6509                             (struct sctp_paramhdr *)chunks_store,
6510                             plen);
6511                         if (phdr == NULL)
6512                                 return (-30);
6513                         chunks = (struct sctp_auth_chunk_list *)phdr;
6514                         num_chunks = plen - sizeof(*chunks);
6515                         if (stcb->asoc.peer_auth_chunks != NULL)
6516                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6517                         else
6518                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6519                         for (i = 0; i < num_chunks; i++) {
6520                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6521                                     stcb->asoc.peer_auth_chunks);
6522                                 /* record asconf/asconf-ack if listed */
6523                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6524                                         saw_asconf = 1;
6525                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6526                                         saw_asconf_ack = 1;
6527
6528                         }
6529                         got_chklist = 1;
6530                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6531                             (ptype == SCTP_STATE_COOKIE) ||
6532                             (ptype == SCTP_UNRECOG_PARAM) ||
6533                             (ptype == SCTP_COOKIE_PRESERVE) ||
6534                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6535                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6536                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6537                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6538                     (ptype == SCTP_SUCCESS_REPORT)) {
6539                          /* don't care */ ;
6540                 } else {
6541                         if ((ptype & 0x8000) == 0x0000) {
6542                                 /*
6543                                  * must stop processing the rest of the
6544                                  * param's. Any report bits were handled
6545                                  * with the call to
6546                                  * sctp_arethere_unrecognized_parameters()
6547                                  * when the INIT or INIT-ACK was first seen.
6548                                  */
6549                                 break;
6550                         }
6551                 }
6552
6553 next_param:
6554                 offset += SCTP_SIZE32(plen);
6555                 if (offset >= limit) {
6556                         break;
6557                 }
6558                 phdr = sctp_get_next_param(m, offset, &param_buf,
6559                     sizeof(param_buf));
6560         }
6561         /* Now check to see if we need to purge any addresses */
6562         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6563                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6564                     SCTP_ADDR_NOT_IN_ASSOC) {
6565                         /* This address has been removed from the asoc */
6566                         /* remove and free it */
6567                         stcb->asoc.numnets--;
6568                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6569                         sctp_free_remote_addr(net);
6570                         if (net == stcb->asoc.primary_destination) {
6571                                 stcb->asoc.primary_destination = NULL;
6572                                 sctp_select_primary_destination(stcb);
6573                         }
6574                 }
6575         }
6576         if ((stcb->asoc.ecn_supported == 1) &&
6577             (peer_supports_ecn == 0)) {
6578                 stcb->asoc.ecn_supported = 0;
6579         }
6580         if ((stcb->asoc.prsctp_supported == 1) &&
6581             (peer_supports_prsctp == 0)) {
6582                 stcb->asoc.prsctp_supported = 0;
6583         }
6584         if ((stcb->asoc.auth_supported == 1) &&
6585             ((peer_supports_auth == 0) ||
6586             (got_random == 0) || (got_hmacs == 0))) {
6587                 stcb->asoc.auth_supported = 0;
6588         }
6589         if ((stcb->asoc.asconf_supported == 1) &&
6590             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6591             (stcb->asoc.auth_supported == 0) ||
6592             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6593                 stcb->asoc.asconf_supported = 0;
6594         }
6595         if ((stcb->asoc.reconfig_supported == 1) &&
6596             (peer_supports_reconfig == 0)) {
6597                 stcb->asoc.reconfig_supported = 0;
6598         }
6599         if ((stcb->asoc.idata_supported == 1) &&
6600             (peer_supports_idata == 0)) {
6601                 stcb->asoc.idata_supported = 0;
6602         }
6603         if ((stcb->asoc.nrsack_supported == 1) &&
6604             (peer_supports_nrsack == 0)) {
6605                 stcb->asoc.nrsack_supported = 0;
6606         }
6607         if ((stcb->asoc.pktdrop_supported == 1) &&
6608             (peer_supports_pktdrop == 0)) {
6609                 stcb->asoc.pktdrop_supported = 0;
6610         }
6611         /* validate authentication required parameters */
6612         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6613                 /* peer does not support auth but sent a chunks list? */
6614                 return (-31);
6615         }
6616         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6617                 /* peer supports asconf but not auth? */
6618                 return (-32);
6619         } else if ((peer_supports_asconf == 1) &&
6620                     (peer_supports_auth == 1) &&
6621             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6622                 return (-33);
6623         }
6624         /* concatenate the full random key */
6625         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6626         if (chunks != NULL) {
6627                 keylen += sizeof(*chunks) + num_chunks;
6628         }
6629         new_key = sctp_alloc_key(keylen);
6630         if (new_key != NULL) {
6631                 /* copy in the RANDOM */
6632                 if (p_random != NULL) {
6633                         keylen = sizeof(*p_random) + random_len;
6634                         memcpy(new_key->key, p_random, keylen);
6635                 } else {
6636                         keylen = 0;
6637                 }
6638                 /* append in the AUTH chunks */
6639                 if (chunks != NULL) {
6640                         memcpy(new_key->key + keylen, chunks,
6641                             sizeof(*chunks) + num_chunks);
6642                         keylen += sizeof(*chunks) + num_chunks;
6643                 }
6644                 /* append in the HMACs */
6645                 if (hmacs != NULL) {
6646                         memcpy(new_key->key + keylen, hmacs,
6647                             sizeof(*hmacs) + hmacs_len);
6648                 }
6649         } else {
6650                 /* failed to get memory for the key */
6651                 return (-34);
6652         }
6653         if (stcb->asoc.authinfo.peer_random != NULL)
6654                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6655         stcb->asoc.authinfo.peer_random = new_key;
6656         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6657         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6658
6659         return (0);
6660 }
6661
6662 int
6663 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6664     struct sctp_nets *net)
6665 {
6666         /* make sure the requested primary address exists in the assoc */
6667         if (net == NULL && sa)
6668                 net = sctp_findnet(stcb, sa);
6669
6670         if (net == NULL) {
6671                 /* didn't find the requested primary address! */
6672                 return (-1);
6673         } else {
6674                 /* set the primary address */
6675                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6676                         /* Must be confirmed, so queue to set */
6677                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6678                         return (0);
6679                 }
6680                 stcb->asoc.primary_destination = net;
6681                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6682                         sctp_free_remote_addr(stcb->asoc.alternate);
6683                         stcb->asoc.alternate = NULL;
6684                 }
6685                 net = TAILQ_FIRST(&stcb->asoc.nets);
6686                 if (net != stcb->asoc.primary_destination) {
6687                         /*
6688                          * first one on the list is NOT the primary
6689                          * sctp_cmpaddr() is much more efficient if the
6690                          * primary is the first on the list, make it so.
6691                          */
6692                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6693                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6694                 }
6695                 return (0);
6696         }
6697 }
6698
6699 int
6700 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6701 {
6702         /*
6703          * This function serves two purposes. It will see if a TAG can be
6704          * re-used and return 1 for yes it is ok and 0 for don't use that
6705          * tag. A secondary function it will do is purge out old tags that
6706          * can be removed.
6707          */
6708         struct sctpvtaghead *chain;
6709         struct sctp_tagblock *twait_block;
6710         struct sctpasochead *head;
6711         struct sctp_tcb *stcb;
6712         int i;
6713
6714         SCTP_INP_INFO_RLOCK();
6715         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6716             SCTP_BASE_INFO(hashasocmark))];
6717         LIST_FOREACH(stcb, head, sctp_asocs) {
6718                 /*
6719                  * We choose not to lock anything here. TCB's can't be
6720                  * removed since we have the read lock, so they can't be
6721                  * freed on us, same thing for the INP. I may be wrong with
6722                  * this assumption, but we will go with it for now :-)
6723                  */
6724                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6725                         continue;
6726                 }
6727                 if (stcb->asoc.my_vtag == tag) {
6728                         /* candidate */
6729                         if (stcb->rport != rport) {
6730                                 continue;
6731                         }
6732                         if (stcb->sctp_ep->sctp_lport != lport) {
6733                                 continue;
6734                         }
6735                         /* Its a used tag set */
6736                         SCTP_INP_INFO_RUNLOCK();
6737                         return (0);
6738                 }
6739         }
6740         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6741         /* Now what about timed wait ? */
6742         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6743                 /*
6744                  * Block(s) are present, lets see if we have this tag in the
6745                  * list
6746                  */
6747                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6748                         if (twait_block->vtag_block[i].v_tag == 0) {
6749                                 /* not used */
6750                                 continue;
6751                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6752                             now->tv_sec) {
6753                                 /* Audit expires this guy */
6754                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6755                                 twait_block->vtag_block[i].v_tag = 0;
6756                                 twait_block->vtag_block[i].lport = 0;
6757                                 twait_block->vtag_block[i].rport = 0;
6758                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6759                                     (twait_block->vtag_block[i].lport == lport) &&
6760                             (twait_block->vtag_block[i].rport == rport)) {
6761                                 /* Bad tag, sorry :< */
6762                                 SCTP_INP_INFO_RUNLOCK();
6763                                 return (0);
6764                         }
6765                 }
6766         }
6767         SCTP_INP_INFO_RUNLOCK();
6768         return (1);
6769 }
6770
6771 static void
6772 sctp_drain_mbufs(struct sctp_tcb *stcb)
6773 {
6774         /*
6775          * We must hunt this association for MBUF's past the cumack (i.e.
6776          * out of order data that we can renege on).
6777          */
6778         struct sctp_association *asoc;
6779         struct sctp_tmit_chunk *chk, *nchk;
6780         uint32_t cumulative_tsn_p1;
6781         struct sctp_queued_to_read *control, *ncontrol;
6782         int cnt, strmat;
6783         uint32_t gap, i;
6784         int fnd = 0;
6785
6786         /* We look for anything larger than the cum-ack + 1 */
6787
6788         asoc = &stcb->asoc;
6789         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6790                 /* none we can reneg on. */
6791                 return;
6792         }
6793         SCTP_STAT_INCR(sctps_protocol_drains_done);
6794         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6795         cnt = 0;
6796         /* Ok that was fun, now we will drain all the inbound streams? */
6797         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6798                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6799 #ifdef INVARIANTS
6800                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6801                                 panic("Huh control: %p on_q: %d -- not ordered?",
6802                                     control, control->on_strm_q);
6803                         }
6804 #endif
6805                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6806                                 /* Yep it is above cum-ack */
6807                                 cnt++;
6808                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6809                                 KASSERT(control->length > 0, ("control has zero length"));
6810                                 if (asoc->size_on_all_streams >= control->length) {
6811                                         asoc->size_on_all_streams -= control->length;
6812                                 } else {
6813 #ifdef INVARIANTS
6814                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6815 #else
6816                                         asoc->size_on_all_streams = 0;
6817 #endif
6818                                 }
6819                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6820                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6821                                 if (control->on_read_q) {
6822                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6823                                         control->on_read_q = 0;
6824                                 }
6825                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6826                                 control->on_strm_q = 0;
6827                                 if (control->data) {
6828                                         sctp_m_freem(control->data);
6829                                         control->data = NULL;
6830                                 }
6831                                 sctp_free_remote_addr(control->whoFrom);
6832                                 /* Now its reasm? */
6833                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6834                                         cnt++;
6835                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6836                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6837                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6838                                                 asoc->size_on_reasm_queue -= chk->send_size;
6839                                         } else {
6840 #ifdef INVARIANTS
6841                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6842 #else
6843                                                 asoc->size_on_reasm_queue = 0;
6844 #endif
6845                                         }
6846                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6847                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6848                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6849                                         if (chk->data) {
6850                                                 sctp_m_freem(chk->data);
6851                                                 chk->data = NULL;
6852                                         }
6853                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6854                                 }
6855                                 sctp_free_a_readq(stcb, control);
6856                         }
6857                 }
6858                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6859 #ifdef INVARIANTS
6860                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6861                                 panic("Huh control: %p on_q: %d -- not unordered?",
6862                                     control, control->on_strm_q);
6863                         }
6864 #endif
6865                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6866                                 /* Yep it is above cum-ack */
6867                                 cnt++;
6868                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6869                                 KASSERT(control->length > 0, ("control has zero length"));
6870                                 if (asoc->size_on_all_streams >= control->length) {
6871                                         asoc->size_on_all_streams -= control->length;
6872                                 } else {
6873 #ifdef INVARIANTS
6874                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6875 #else
6876                                         asoc->size_on_all_streams = 0;
6877 #endif
6878                                 }
6879                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6880                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6881                                 if (control->on_read_q) {
6882                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6883                                         control->on_read_q = 0;
6884                                 }
6885                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6886                                 control->on_strm_q = 0;
6887                                 if (control->data) {
6888                                         sctp_m_freem(control->data);
6889                                         control->data = NULL;
6890                                 }
6891                                 sctp_free_remote_addr(control->whoFrom);
6892                                 /* Now its reasm? */
6893                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6894                                         cnt++;
6895                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6896                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6897                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6898                                                 asoc->size_on_reasm_queue -= chk->send_size;
6899                                         } else {
6900 #ifdef INVARIANTS
6901                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6902 #else
6903                                                 asoc->size_on_reasm_queue = 0;
6904 #endif
6905                                         }
6906                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6907                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6908                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6909                                         if (chk->data) {
6910                                                 sctp_m_freem(chk->data);
6911                                                 chk->data = NULL;
6912                                         }
6913                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6914                                 }
6915                                 sctp_free_a_readq(stcb, control);
6916                         }
6917                 }
6918         }
6919         if (cnt) {
6920                 /* We must back down to see what the new highest is */
6921                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6922                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6923                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6924                                 asoc->highest_tsn_inside_map = i;
6925                                 fnd = 1;
6926                                 break;
6927                         }
6928                 }
6929                 if (!fnd) {
6930                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6931                 }
6932
6933                 /*
6934                  * Question, should we go through the delivery queue? The
6935                  * only reason things are on here is the app not reading OR
6936                  * a p-d-api up. An attacker COULD send enough in to
6937                  * initiate the PD-API and then send a bunch of stuff to
6938                  * other streams... these would wind up on the delivery
6939                  * queue.. and then we would not get to them. But in order
6940                  * to do this I then have to back-track and un-deliver
6941                  * sequence numbers in streams.. el-yucko. I think for now
6942                  * we will NOT look at the delivery queue and leave it to be
6943                  * something to consider later. An alternative would be to
6944                  * abort the P-D-API with a notification and then deliver
6945                  * the data.... Or another method might be to keep track of
6946                  * how many times the situation occurs and if we see a
6947                  * possible attack underway just abort the association.
6948                  */
6949 #ifdef SCTP_DEBUG
6950                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6951 #endif
6952                 /*
6953                  * Now do we need to find a new
6954                  * asoc->highest_tsn_inside_map?
6955                  */
6956                 asoc->last_revoke_count = cnt;
6957                 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6958                     SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6959                 /* sa_ignore NO_NULL_CHK */
6960                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6961                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6962         }
6963         /*
6964          * Another issue, in un-setting the TSN's in the mapping array we
6965          * DID NOT adjust the highest_tsn marker.  This will cause one of
6966          * two things to occur. It may cause us to do extra work in checking
6967          * for our mapping array movement. More importantly it may cause us
6968          * to SACK every datagram. This may not be a bad thing though since
6969          * we will recover once we get our cum-ack above and all this stuff
6970          * we dumped recovered.
6971          */
6972 }
6973
6974 void
6975 sctp_drain()
6976 {
6977         /*
6978          * We must walk the PCB lists for ALL associations here. The system
6979          * is LOW on MBUF's and needs help. This is where reneging will
6980          * occur. We really hope this does NOT happen!
6981          */
6982         VNET_ITERATOR_DECL(vnet_iter);
6983         VNET_LIST_RLOCK_NOSLEEP();
6984         VNET_FOREACH(vnet_iter) {
6985                 CURVNET_SET(vnet_iter);
6986                 struct sctp_inpcb *inp;
6987                 struct sctp_tcb *stcb;
6988
6989                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6990                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6991 #ifdef VIMAGE
6992                         continue;
6993 #else
6994                         return;
6995 #endif
6996                 }
6997                 SCTP_INP_INFO_RLOCK();
6998                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6999                         /* For each endpoint */
7000                         SCTP_INP_RLOCK(inp);
7001                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7002                                 /* For each association */
7003                                 SCTP_TCB_LOCK(stcb);
7004                                 sctp_drain_mbufs(stcb);
7005                                 SCTP_TCB_UNLOCK(stcb);
7006                         }
7007                         SCTP_INP_RUNLOCK(inp);
7008                 }
7009                 SCTP_INP_INFO_RUNLOCK();
7010                 CURVNET_RESTORE();
7011         }
7012         VNET_LIST_RUNLOCK_NOSLEEP();
7013 }
7014
7015 /*
7016  * start a new iterator
7017  * iterates through all endpoints and associations based on the pcb_state
7018  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7019  * assocs and "ef" (optional) is executed when the iterator completes.
7020  * "inpf" (optional) is executed for each new endpoint as it is being
7021  * iterated through. inpe (optional) is called when the inp completes
7022  * its way through all the stcbs.
7023  */
7024 int
7025 sctp_initiate_iterator(inp_func inpf,
7026     asoc_func af,
7027     inp_func inpe,
7028     uint32_t pcb_state,
7029     uint32_t pcb_features,
7030     uint32_t asoc_state,
7031     void *argp,
7032     uint32_t argi,
7033     end_func ef,
7034     struct sctp_inpcb *s_inp,
7035     uint8_t chunk_output_off)
7036 {
7037         struct sctp_iterator *it = NULL;
7038
7039         if (af == NULL) {
7040                 return (-1);
7041         }
7042         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7043                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7044                     SCTP_BASE_VAR(sctp_pcb_initialized));
7045                 return (-1);
7046         }
7047         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7048             SCTP_M_ITER);
7049         if (it == NULL) {
7050                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7051                 return (-1);
7052         }
7053         memset(it, 0, sizeof(*it));
7054         it->function_assoc = af;
7055         it->function_inp = inpf;
7056         if (inpf)
7057                 it->done_current_ep = 0;
7058         else
7059                 it->done_current_ep = 1;
7060         it->function_atend = ef;
7061         it->pointer = argp;
7062         it->val = argi;
7063         it->pcb_flags = pcb_state;
7064         it->pcb_features = pcb_features;
7065         it->asoc_state = asoc_state;
7066         it->function_inp_end = inpe;
7067         it->no_chunk_output = chunk_output_off;
7068         it->vn = curvnet;
7069         if (s_inp) {
7070                 /* Assume lock is held here */
7071                 it->inp = s_inp;
7072                 SCTP_INP_INCR_REF(it->inp);
7073                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7074         } else {
7075                 SCTP_INP_INFO_RLOCK();
7076                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7077                 if (it->inp) {
7078                         SCTP_INP_INCR_REF(it->inp);
7079                 }
7080                 SCTP_INP_INFO_RUNLOCK();
7081                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7082
7083         }
7084         SCTP_IPI_ITERATOR_WQ_LOCK();
7085         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7086                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7087                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7088                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7089                 SCTP_FREE(it, SCTP_M_ITER);
7090                 return (-1);
7091         }
7092         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7093         if (sctp_it_ctl.iterator_running == 0) {
7094                 sctp_wakeup_iterator();
7095         }
7096         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7097         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7098         return (0);
7099 }